KR101971234B1 - Caterpillar wheel applied agricultural forklift - Google Patents

Abstract

The present invention relates to an agricultural forklift truck having a caterpillar, and more specifically, to an agricultural forklift truck having a caterpillar, which adopts a caterpillar in order to work in an agricultural environment of off-road represented by an orchard, a rice paddy, a field, a livestock shed and the like, adopts a structure where a fork unit is stretched forward in order to extend working area, and omits weight for preventing turnover when the fork unit is stretched by transferring a driving power generation unit to a rear end in response to a stretched length of the fork unit. For the purpose, the agricultural forklift truck having a caterpillar according to the present invention comprises: a base frame having a caterpillar; a length adjustment unit formed on the base frame; a mast sliding on the base frame as the length adjustment unit is stretched, and having a fork unit at one side thereof; and a driving power generation unit sliding on the base frame as the length adjustment unit is stretched, and supplying driving power to the caterpillar.

Description

[0002] Caterpillar wheel applied agricultural forklift,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an agricultural forklift truck having a caterpillar, and more particularly, to a caterpillar that can be used in an off-road agricultural environment represented by orchards, paddy fields, fields, The driving force generating portion moves rearward corresponding to the fork extension length in order to prevent overturning of the forklift during the extension of the fork portion so that the weight of the caterpillar The present invention relates to an agricultural forklift.

Off-road agricultural environment, generally represented by orchards, paddy fields, fields, barns, etc., has a condition in which forklifts can be frequently rolled over unlike ordinary industrial environments.

However, forklifts used in general industrial environments can be used only on flat grounds such as warehouses, housing, etc., and their use is limited in a field where a lot of agricultural work is actually done.

In the case of such an industrial forklift, a counterbalance weight mounted on the rear of the vehicle body is separated from the vehicle body, a lower end portion is provided with a hinge on the vehicle body, and a hydraulic pressure is applied to the upper side portion. There is known a forklift which moves the counterbalance weight to the rear side of the vehicle body by operating the cylinder with a cylinder to be operated thereby to vary the load of the counterbalance weight.

Korean Patent Laid-Open No. 10-2016-0032898 (hereinafter referred to as Prior Art 2) includes a base frame having a counterweight and a driving wheel; A pair of length adjusters including a cylinder member provided on the base frame, a piston member having a protruding length adjusted from the cylinder member, and a moving frame moving on the base frame along the piston member; And a support portion which is provided to cross the pair of length adjusting portions and has a mast at an upper portion thereof and whose distance from the base frame is adjusted according to the protruding length of the piston member.

However, since both of the preceding documents 1 and 2 include counterweights, the weight of the forklift itself is increased and the fuel consumption is increased. In addition, in the off-road agricultural environment, There is a big problem.

Prior Art 1: Practical New Korean Patent Registration No. 20-0221857 Prior Art 2: Korean Patent Publication No. 10-2016-0032898

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and an agricultural forklift truck having a caterpillar according to the present invention can be used in an off-road agricultural environment represented by an orchard, rice field, field, And to provide a structure capable of stable running and rollover prevention.

It is also an object of the present invention to provide a structure in which a fork portion is extended forward to expand the working width so as to be applicable to an agricultural environment.

It is another object of the present invention to provide a structure in which the weight for preventing rollover is omitted so that the driving force generating portion moves backward in correspondence with the fork extension length in order to prevent rollover of the forklift during fork extension.

According to an aspect of the present invention, there is provided an agricultural forklift having a caterpillar, comprising: a base frame having a caterpillar; A length adjuster formed on the base frame; A mast which slides on the base frame in accordance with the expansion and contraction of the length adjuster and has a fork formed on one side thereof; And a driving force generating unit that slides on the base frame in accordance with the elongation and contraction of the length adjusting unit and supplies power to the cater pillar, The length adjusting unit includes a bidirectional cylinder having a mast side to which the mast is connected and a generating unit side to which the driving force generating unit is connected, so that the driving force generating unit can perform the count weight function corresponding to the weight of the fork unit, The generating portion is provided at a position opposite to the mast so that the center of gravity of the forklift A can be aligned so that the weight of the driving force generating portion is used as the count weight.

In addition, the length adjuster adjusts the amount of expansion and contraction of the cylinder on the generator side according to the weight measured by the load cell attached to the fork, or when the weight is loaded on the fork by the inclination sensor attached to the operation controller, Side cylinder in accordance with the amount of deflection of the mast-side cylinder or adjusts the amount of expansion and contraction of the cylinder in the generating-side in proportion to the amount of expansion and contraction of the mast-side cylinder during operation, while the driving force generating unit is provided with a control process The weight of the driving force generating unit and the worker performs the count weight function.

In addition, the driving force generating unit is provided with a foot plate on which a worker can ride, so that the weight of the driving force generating unit and the worker performs a count weight function.

The agricultural forklift having the above-described features according to the present invention is characterized in that the forklift is replaced with a caterpillar of a conventional wheel so that the off-road which is represented by an orchard, paddy field, field, There is an effect of stable running and rollover prevention in agricultural environment.

Further, by adopting a structure in which the fork portion extends forward, it is possible to enlarge the working width and have an effect suitable for an agricultural environment.

Further, in order to prevent rollover of the forklift during the extension of the fork portion, the driving force generating portion moves backward corresponding to the fork portion elongation length, thereby omitting the weight for preventing rollover, thereby enhancing fuel economy, And has an excellent effect in preventing rollover in the environment.

Further, adopting a structure in which a caterpillar is adopted and a mast can be stretched and shrunk while being positioned between the caterpillar, the overall width of the forklift can be reduced while the working width can be enlarged.

1 is a perspective view showing an agricultural forklift having a caterpillar according to the present invention;
Fig. 2 is a perspective view showing the base frame of Fig.
Fig. 3 is a plan view showing an agricultural forklift having the caterpillar of Fig. 1
Fig. 4 is a side view showing an agricultural forklift having the caterpillar of Fig. 1
Fig. 5 is a side view showing the elongated state of the length adjusting portion of Fig. 4
6 is a side view showing the driving force generating portion of FIG.

The term used in the present invention is a general term that is widely used at present. However, in some cases, there is a term selected arbitrarily by the applicant. In this case, the term used in the present invention It is necessary to understand the meaning.

Hereinafter, the technical structure of the present invention will be described in detail with reference to preferred embodiments shown in the accompanying drawings. Here, the expressions related to the directions of up, down, right, left, right, left, and bottom are all based on the drawings presented unless otherwise specified.

As shown in FIGS. 1 to 5, the agricultural forklift having the caterpillar according to the present invention includes a base frame 10 provided with a caterpillar 11, a length adjuster 20 formed on the base frame, , A mast (30) having a fork portion (31) formed on one side thereof while sliding the base frame according to the expansion and contraction of the length adjusting portion, and a motor (30) sliding the base frame according to the expansion and contraction of the length adjusting portion And a driving force generating unit 40 for driving the driving force generating unit.

Here, the forklift A can be an unmanned forklift operated by a remote control (not shown) without a separate driver's seat on which the operator can be seated. Further, the forklift A can be adjusted have.

The base frame 10 constitutes a basic frame of the forklift A and the caterpillar 11 is formed on both sides of the base frame so that the forklift A receives the driving force from the driving force generating unit 40, It becomes possible to move back and forth.

To this end, the base frame is provided with a traveling motor (13) for driving the forklift by driving a caterpillar.

The traveling motor 13 is an AC motor and is driven by a power supply unit (not shown) built in the driving force generation unit 40, which is composed of a first driving motor and a second driving motor.

Here, the present invention replaces the conventional wheel-type driving member with a caterpillar, thereby enabling stable running and rollover prevention in an off-road agricultural environment represented by an orchard, paddy field, field, housing, and the like.

The base frame 10 is formed with a mast plate 107 on which a mast trail 109 is formed so that the mast can be slid and a connecting plate 101 .

In this case, since the generating plate 103 is formed higher than the mast plate 107, the motor can be disposed at the bottom of the driving force generating unit 40, thereby easily supplying power from the driving force generating unit 40 to the motor And the weight of the motor itself can be performed by the weight of the motor.

The length adjuster 20 has a structure in which the mast 30 is extended in the work direction, that is, the fork portion extends forward, thereby performing the function of expanding the width of the work of the forklift.

The present invention replaces the conventional structure in which the fork portion is expanded and contracted by a structure in which the mast is stretchable and contractable, and as a result, the fork portion formed thereon can be stretched or shrunk, and the work width of the forklift is widened.

On the other hand, since the mast is stretchable and contractible, it is possible to position the mast in the caterpillar formed in the longitudinal direction, thereby reducing the overall length of the forklift.

In addition, the length adjusting portion 20 performs the count weight function in accordance with the weight of the fork portion formed in the mast extending in the working direction by extending the driving force generating portion 40 in the work opposite direction.

The counterweight C formed on a conventional forklift is provided to prevent the heavy equipment such as the forklift A from overturning when a heavy object is transported. The counterweight C is mounted on an object lifted by the fork portion of the forklift A In order to prevent the forklift A loaded with the heavy object from falling forward, it acts as a weight against the lifting load far from the point where it intersects.

In the present invention, the weight of the driving force generating portion is used as the count weight by extending the driving force generating portion 40 in the opposite direction of the work without forming a separate count weight.

As described above, the driving force generating unit 40 can be provided at a position opposite to the fork portion and the mast, which are working machines, so that the center of gravity of the forklift A can be aligned. Accordingly, it is possible to evenly distribute the load when lifting and lowering the heavy object by the working machine to secure the elevating operation and the stability of movement, and to perform smooth operation.

The length adjuster may be a bidirectional cylinder having a mast connected to the mast and a generator connected to the driving force generating unit.

Since the mast 30 is designed to have a size capable of positioning a pair of the caterpillar 11, the entire size of the forklift can be reduced when the forklift is stored.

Here, the mast 30 is vertically provided on the base frame, and may include a chain (not shown) and a chain pulley (not shown) to move the fork portion 31 up and down. At this time, the fork portion 31 is rotatably provided on the mast 30, and when the forklift A is stored, the fork portion 31 is housed in a pair of the caterpillar 11.

The fork portion 31 is formed to be hinged to the mast 140 so that the fork portion 31 can be folded into the mast after being housed in the pair of caterpillar 11.

Thus, when the weight is loaded on the fork portion 31 provided at right angles to the mast 30, the angle may be restricted so as to prevent the fork portion 31 from being rotated downward by the weight.

Here, the fork portion 31 is rotated from 0 degrees to 90 degrees with respect to the mast 30, and the angle restriction of the fork portion 31 is performed by a stopper (not shown) have.

Such adjustment of the rotational angle of the fork portion 31 is replaced by a known technique.

On one side of the mast, a mast slider (35) is formed which rolls on the mast trail (109) of the base frame so that the mast can slide on the base frame in accordance with the expansion and contraction of the length adjuster.

On the other hand, the mast slider 35 rolls on the base frame mast trail 109 so that the driving force generating unit can slide on the base frame as the length adjusting unit expands and contracts. The roller 351, which rolls on the base frame mast trail 109, And is formed at the bottom.

The driving force generating unit 40 is provided with a microcomputer (not shown) for adjusting a mast or the like for a transportation operation, a power supply unit for supplying power to the traveling motor, and a sliding guide 45.

The microcomputer can receive the work instruction of the operator through the operation controller 41 provided in the driving force generating unit 40 and can receive the operation instruction through the normal Bluetooth communication module, the Xbee communication module, the Wi-Fi communication module, You can receive instructions.

On the other hand, the microcomputer can adjust the expansion / contraction amount of the cylinder on the mast side and the generation side of the length adjusting portion through three methods.

That is, the microcomputer adjusts the expansion / contraction amount of the cylinder on the generator side according to the weight measured by the load cell (not shown) attached to the fork portion, and when the weight is loaded on the fork portion by the inclination sensor attached to the operation controller, A control process of measuring the amount of additional deformation to adjust the amount of expansion and contraction of the mast-side cylinder according to the amount of deflection, or adjusting the amount of expansion and contraction of the cylinder at the generator side in proportion to the amount of expansion and contraction of the mast-

On the other hand, the power supply unit comprises a BMS (Battery Management System) and a cable connecting the battery pack 43 and the drive motor.

The BMS transmits charging information of each of a plurality of subpacks constituting the battery pack to the microcomputer so that the microcomputer determines the charging order and the charging amount of the subpack, The driving of the driving motor is stopped and the second driving motor is driven according to the driving of the first driving motor to charge the battery pack 43 with electricity.

A roller 451 rolling on the generation part rail 105 of the base frame rotates on the bracket 453 so that the driving force generating part can slide on the base frame in accordance with the expansion and contraction of the length adjusting part. In the driving force generating portion bottom portion.

In addition, the driving force generating unit is provided with a footrest 47 on which a worker can ride, so that the weight of the driving force generating unit and the worker performs the count weight function.

The footrest 47 is hinged so that when an operator does not ride the vehicle and is operated remotely, the footrest 47 is folded in the driving force generating portion, thereby securing a working space. Further, When a worker is aboard, the weight of the count weight can be increased by unfolding the scaffold to be carried by an operator.

For this purpose, a load cell (not shown) is installed on a hinge connection portion of the foot plate, and the weight of the worker is checked, and the microcomputer calculates the total weight of the count weight to maintain balance.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the present invention. Various modifications and variations will be possible without departing from the spirit of the invention. Therefore, the scope of the present invention should be construed as being covered by the scope of the appended claims, and technical scope within the scope of equivalents thereof should be construed as being included in the scope of the present invention.

10: base frame 11: caterpillar
13: Running motor 20: Length adjusting section
30: mast 31: fork portion
35: mast slider 40: driving force generating section
41: Operation controller 43: Battery
45: Generator Slider

Claims (1)

A base frame provided with a caterpillar; A length adjuster formed on the base frame; A mast which slides on the base frame in accordance with the expansion and contraction of the length adjuster and has a fork formed on one side thereof; And a driving force generating unit sliding on the base frame in accordance with elongation and contraction of the length adjusting unit and supplying power to the cater pillar,
The length adjuster measures the weight measured by the load cell attached to the fork portion or the degree of sagging of the fork portion when a weight is loaded on the fork portion by the inclination sensor attached to the operation controller portion, Direction cylinder having a mast side to which a mast is connected and a generation side to which a driving force generating unit is connected such that the driving force generating unit is extended in a direction opposite to the work corresponding to a mast cylinder extending in a working direction according to the amount of expansion and contraction The driving force generating unit is provided at a position opposite to the mast so that the center of gravity of the forklift A can be aligned so that the driving force generating unit can perform the count weight function corresponding to the weight or deflection amount,
Wherein the driving force generating unit is provided with a foot plate on which a worker can ride so that the weight of the worker performs the count weight function in addition to the driving force generating unit.

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