KR101832146B1 - Folding type remote controlled fork lift truck - Google Patents

Abstract

The present invention relates to a foldable remote-controlled fork lift truck which can be used by being carried on a cargo truck. To this end, according to the present invention, the foldable remote-controlled fork lift truck comprises: a front vehicle body with a movable axle installed; a rear vehicle body connected to the front vehicle body by a joint, having a driving axle and a counter weight installed; a steering actuator installed in between the front vehicle body and rear vehicle body to control the moving direction by folding the part in between the front vehicle body and rear vehicle body by elongation and contraction; a carriage installed on the front side of the front vehicle body; a fork whose bottom is connected to the carriage by a hinge that is foldable towards the carriage and which is placed to lift luggage; a mast whose bottom side is connected to the front vehicle body by a hinge to be foldable and which elevates the fork and carriage at the same time by operation of a hydraulic apparatus; and one or more folding actuators installed on the front vehicle body to stand or lay the carriage and the mast by elongation and contraction. The present invention provides the foldable remote-controlled fork lift truck which can control the position of a fork and a mast on a vehicle body, thereby balancing weight.

Description

FOLDING TYPE REMOTE CONTROLLED FORK LIFT TRUCK

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a folding forklift, and more particularly, to a folding type remote control forklift which is used for lifting or lowering a cargo to and from a freight car while loading it in a freight car.

Forklifts are special industrial vehicles used to load and carry luggage and cargo, and are widely used throughout the industry in recent years, such as when unloading or transporting various cargo during cargo transportation.

1 and 2 show an example of a general four-wheel forklift, in which a pair of front wheels 13 and rear wheels 12 are provided and a mast assembly 2 is installed in front of the vehicle body 1 And a power source such as an engine or a battery is provided inside the vehicle body 1.

The mast assembly 2 is provided with a mast rail 3 arranged in a vertical direction and a carriage 4 vertically movable up and down along the mast rail 3.

In addition, the mast assembly 2 is provided so as to be slightly tilted toward the driver's seat by a tilt actuator (tilt cylinder) 10 for safety during unloading work.

The carriage 4 is vertically moved up and down by a lift chain 6 and a pair of forks 7 for lifting the load are mounted on the front of the carriage 4.

In addition, the pair of forks 7 are provided so as to be adjustable in width from left and right, and a back rest 5 for supporting the load is installed on the upper portion.

An overhead guard 8 for protecting the driver is provided on the driver's seat 9 on the upper portion of the vehicle body 1. An overhead guard 8 for protecting the driver is provided on the driver's seat 9, And a counterweight 11 for catching the center of gravity according to the weight of the cargo is provided at the rear.

However, since the forklift according to the related art constructed as described above is bulky and heavy, it is difficult to carry it on the freight vehicle, so that it is inconvenient to move slowly to the place where the freight is loaded using the self- In this case, due to the characteristics of the forklift, which is considerably slower than that of a general vehicle, the arrival time is late compared to the freight vehicle, which causes a delay in the loading time of the cargo.

Accordingly, Korean Patent Registration Nos. 10-1423842 and 10-1569874 disclose a technology for folding a forklift truck and using it to unload freight while carrying it on a freight vehicle while minimizing the volume.

However, this is merely a structure for reducing the volume of the fork and fork of the forklift by reducing the volume of the forklift. Thus, it is difficult to reduce the overall length of the forklift and it is very difficult to center the weight of the car according to the weight of the cargo When the center of gravity of the vehicle is shifted to the front due to the load of the weight lifted by the fork during the operation of the Dada Haa station, the opposite side is easily heard or transmitted.

In addition, since the conventional folding forklift is made of a so-called rear wheel steering system using a steering wheel, safety is good, but it is difficult to work in a narrow and narrow working radius, the work efficiency is low, and the height of the vehicle body There is no structural limit.

It is to be understood that the above-described techniques are intended to assist the understanding of the present invention, and are not to be construed as meaning that the present invention is well known in the art to which the present invention belongs.

KR 10-1423842 B1 (July 21, 2014) KR 10-1569874 B1 (2015.11.11) KR 10-2016-0032898 A (2016.03.25)

Accordingly, the present inventor has focused on solving the limitations and problems of the conventional folding forklift considering the above-mentioned matters in detail, and by moving the center of gravity freely when lifting a heavy object such as heavy load or cargo, So that it is possible to maintain the stability of the vehicle body, thereby making it possible to achieve an unloading operation smoothly and stably. Further, it is possible to minimize the turning radius of the vehicle body (vehicle) To develop a new folding type remote control forklift which can be easily operated, can shorten the working time to improve the work efficiency, and can minimize the height of the car body to minimize the volume occupied in the cargo vehicle. As a result of constant research with effort, we invented the present invention It was.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and an object of the present invention is to provide a folding type remote control forklift which can adjust the position of a fork and a mast with respect to the vehicle body.

It is another object of the present invention to provide a folding type remote control forklift which can maintain the stability of a vehicle body during a loading operation.

It is another object of the present invention to provide a folding type remote control forklift capable of minimizing the turning radius of the vehicle body.

Herein, the technical object and object to be solved by the present invention are not limited to the technical object and purpose mentioned above, and another technical object and purpose not mentioned can be understood by those skilled in the art from the following description.

According to a first aspect of the present invention, there is provided a vehicle comprising: a front body provided with a floating axle; a rear body provided with a driving axle and a counterweight; A fork which is connected to the carriage so as to be foldable with respect to the carriage and which is hinged to the carriage so as to be foldable with respect to the carriage, At least one folding actuator installed on the front body for lifting and lowering the carriage and the mast by an extension and contraction action and at least one folding actuator provided on both sides of the front body, A guide rail provided with the fork, the carriage, and the mast, And at least one balancing actuator provided between the front body and the slider for determining and moving the position of the slider relative to the front body by stretching and contracting action It presents a folding remote control forklift that features.

Accordingly, the present invention can move the center of gravity when lifting a heavy object such as a heavy load or a cargo, so that the weight of the heavy object can be balanced to maintain the stability of the body, Can be achieved.

A concrete means according to a second aspect of the present invention is characterized by comprising a front body provided with a flow axle, a rear body connected to the front body by a joint and provided with a driving axle and a counterweight, A steering actuator mounted on the front body and steering the moving direction by bending the front body and the rear body by an elongating and contracting action; a carriage provided on the front side of the front body; A mast connected to the front body and connected to the front body and the lower portion by a hinge joint so as to raise and lower the fork and the carriage at the same time according to the operation of the hydraulic device, And at least one folding or folding mechanism for raising and lowering the carriage and the mast A slider that slides along the guide rail while the fork, the carriage, and the mast are mounted, and a slider that is provided between the front body and the slider, And at least one balancing actuator for determining the position of the slider relative to the front body by a contraction action and moving the slider backward.

Accordingly, the present invention can move the center of gravity when lifting a heavy object such as a heavy load or a cargo, so that the weight of the heavy object can be balanced to maintain the stability of the body, Can be achieved.

In addition, it is possible to minimize the turning radius of the vehicle body, which makes it easier to work in a narrow place, can shorten the working time and improve the work efficiency, as well as minimizing the height of the vehicle body, .

A concrete means according to a third aspect of the present invention is a vehicle including a front body provided with a flow axle, a rear body connected to the front body by a joint and provided with a driving axle and a counterweight, A steering actuator mounted on the front body and steering the moving direction by bending the front body and the rear body by an elongating and contracting action; a carriage provided on the front side of the front body; A mast connected to the front body and connected to the front body and the lower portion by a hinge joint so as to raise and lower the fork and the carriage at the same time according to the operation of the hydraulic device, And at least one folding or folding mechanism for raising and lowering the carriage and the mast And a tilting actuator installed on the rear body for adjusting an inclination of the front body with respect to the rear body by tilting the knuckle joint by an extension and a contraction function.

As a result, the present invention can tilt the fork slanting forward or backward when pushing the fork underneath and lifting the weight more easily and stably.

In addition, it is possible to minimize the turning radius of the vehicle body, which makes it easier to work in a narrow place, can shorten the working time and improve the work efficiency, as well as minimizing the height of the vehicle body, .

A concrete means according to a fourth embodiment of the present invention is characterized by including a front body provided with a floating axle, a rear body connected to the front body by a joint and provided with a driving axle and a counterweight, A steering actuator mounted on the front body and steering the moving direction by bending the front body and the rear body by an elongating and contracting action; a carriage provided on the front side of the front body; A mast which is connected to the front body and connected to the front body and lifts up the load, a mast which is folded by the hinged joint between the front body and the lower hinge and lifts the fork and the carriage at the same time according to the operation of the hydraulic device, And at least one folding or folding mechanism for raising and lowering the carriage and the mast And an actuator is incorporated in the forklift.

Thus, the present invention minimizes the turning radius of the vehicle body, facilitates the work in a narrow place, shortens the working time and improves work efficiency, as well as minimizes the height of the vehicle body, Can be minimized.

Further, a preferred embodiment of the present invention further includes an outrigger mounted on both lower portions of the front body so as to be in close contact with the ground due to the expansion and contraction action of the hydraulic cylinder, thereby preventing the load of the fork- It is possible to improve the stability when loading and lifting heavy objects.

An object of the present invention, which has the means and construction for solving the above object and the technical object of the present invention, is to move the center of gravity arbitrarily when lifting a heavy object such as heavy load or cargo, It is possible to maintain the stability of the body by balancing without balancing, thereby making the unloading work easy and stable.

In addition, it is possible to minimize the turning radius of the vehicle body, which makes it easier to work in a narrow place, can shorten the working time and improve the work efficiency, as well as minimizing the height of the vehicle body, .

In addition, when pushing the fork underneath the weight and lifting it, the carriage and mast can be tilted forward or backward, making it even easier and more reliable to lift or lower the weight.

Here, the effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned can be clearly understood by those skilled in the art from the description of the claims.

1 and 2 are perspective views showing a forklift according to a conventional technique.
3 is a side view of a folding telescopic forklift according to a preferred embodiment of the present invention.
4 is a plan view of a folding remote control forklift according to a preferred embodiment of the present invention.
FIG. 5 is an enlarged side view showing a local part of a folding remote control forklift according to a preferred embodiment of the present invention.
Fig. 6 is a side view showing the folded state of Fig. 5;
FIG. 7 is a side view showing a state where a carriage, a fork, and a mast of a folding remote control forklift according to a preferred embodiment of the present invention are folded to reduce the volume.
8 is an enlarged plan view of a portion of the folding type remote control forklift according to the preferred embodiment of the present invention to explain the locking operation of the fork.
9 and 10 are plan views illustrating a steering operation of a folding remote control forklift according to a preferred embodiment of the present invention.
11 is a side view showing an operation state for explaining the centering process of the folding type remote control forklift according to the preferred embodiment of the present invention.
FIG. 12 is a plan view illustrating an operation state for explaining a gravity centering process of a folding remote control fork lift truck according to a preferred embodiment of the present invention.
FIG. 13 is a front view illustrating an operation state for explaining the gravity centering process of the folding remote control forklift according to the preferred embodiment of the present invention.
14 is a side view for explaining an operation state of an outrigger of a folding remote control forklift according to a preferred embodiment of the present invention.
FIGS. 15 and 16 are side views showing an operation state in which the carriage, the fork and the mast of the folding type remote control forklift are inclined according to the preferred embodiment of the present invention.

Hereinafter, embodiments according to the present invention will be described more specifically with reference to the accompanying drawings.

Prior to this, the following terms are defined in consideration of the functions of the present invention, and they are to be construed to mean concepts that are consistent with the technical idea of the present invention and interpretations that are commonly or commonly understood in the technical field of the present invention.

In the following description, well-known functions or constructions are not described in detail to avoid obscuring the subject matter of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.

In addition, when a part includes an element, it does not exclude other elements unless specifically stated otherwise, but may include other elements.

3 to 16, the folding type remote control forklift according to the preferred embodiment of the present invention includes a front body 10, a rear body 20, and a joint 20 having a guide rail 13 and a slider 14, The steering actuator 30, the carriage 41, the fork 42, the mast 43, the folding actuator 40, the balancing actuator 50, the tilting actuator 60, and the outrigger 70 .

The front body 10 and the rear body 20 are made of a chassis frame having a light weight and a rigid beam having a high rigidity. The front body 10 is provided with a flow axle The rear axle 20 is provided with a driving axle 21 for supporting the weight of the vehicle body through a rear wheel and transmitting the power to the rear wheel and for supporting the force received from the road surface.

The guide rail 13 is fixed to both lower portions of the front body 10 to guide the movement of the slider 14. The slider 14 is fixed to the carriage 41 and the fork 42 and the mast 43, So as to slide along the guide rails 14 while mounting the guide rails 14 on the guide rails 14.

That is, the slider 14 is positioned between the guide rails 13 of the front body 10 and slides in the fore-and-aft direction by the balancing actuator 50 along the guide surfaces to move the carriage 41, the fork 42, (43).

The counterweight 22 is fixed to the lower portion of the rear body 20 to prevent the weight from falling down forward. The counterweight 22 is made up of an electric motor and a combustion engine to operate the fork 42 and the mast 43 And a power section 23 for supplying power to the drive axle 21 for forward and backward movement of the vehicle.

The hydraulic unit of the folding actuator 40, the mast 43, the balancing actuator 50, the tilting actuator 60, and the outrigger 70, including the power unit 23, And the control unit can be controlled by a separate remote input device such as a joystick or a remote controller for instructing and controlling the operation and transmitting various commands. That is, the operation can be controlled and controlled without providing a cockpit for the driver's ride, so that the vehicle can be loaded on the freight vehicle with minimized weight and volume.

The joint J is provided between the knuckle arm 12 of the front body 10 and the knuckle 12 of the rear body 20 so as to freely change the direction of the front body 10 with respect to the rear body 20, (Not shown).

Here, the joint J can adopt a structure such as a ball joint, a knuckle joint, or a universal joint, which can freely change the direction of the front body or move up and down at a certain angle.

The steering actuator 30 is provided between the front body 10 and the rear body 20 so as to control the moving direction by bending the front body 10 and the rear body 20 by a stretching and contracting action.

The steering actuator 30 includes a front body 10 and a rear body 20 at both ends in the longitudinal direction so that the rear body 20 can naturally change the moving direction of the front body 10 according to the elongating and contracting action. Respectively.

Here, the steering actuator 30 employs a conventional hydraulic cylinder or an actuator mechanism or device having a structure that operates by moving forward or backward by transmitting a control signal to a drive source such as a compressor or the like in accordance with the opening and closing of a switch and operating the cylinder rod with hydraulic pressure or air pressure .

The carriage 41 is provided so as to slide along the mast 43 in front of the front body 10, that is, in front of the mast 43 while supporting the fork 42.

As shown in FIG. 8, the carriage 41 is provided with a locking device for restricting the fork 42 to the folded state with respect to the carriage 41.

That is, a latch hole 44 is formed in the carriage 41. One of the latch holes 44 is rotatably and positively movably inserted into the latch hole 44, and the other of the latch hole 44 and the fork 42 is selectively contact- Shaped latch 45 for locking and unlocking the latch 42 and a latch 45 for retaining the fork 42 in a locked state (46) for returning the spring (45) to its original position upon compression by pulling.

Here, the spring 46 is preferably a compression coil spring that provides a force to repel the applied load. However, the spring 46 is not limited to this, and it is possible to use those having the same function and effect, for example, It may be possible to use any of them as long as it acts to resist the heat.

The lower end of the fork 42 is connected to the carriage 41 by a hinged joint so as to be foldable with respect to the carriage 41. [

Here, the fork 42 is preferably formed in such a manner that the width of the fork 42 gradually becomes narrower toward the tip of the fork 42 so that the fork 42 can be inserted into the car inlet of the pallet and lift the pallet.

The mast 43 is connected to the front body 10 by a hinged joint so that the mast 43 can be folded with respect to the front body 10 and the carriage 41 and the fork 42 at the same time.

Here, the mast 43 can be formed of a conventional lift chain, a crosshead, a hydraulic device or the like for raising and lowering the carriage 41 for raising and lowering the carriage 41. In addition, can do.

The folding actuator 40 is provided at least on the inner side of the front body 10 so as to raise or lower the carriage 41 and the mast 43 by stretching and contracting action.

That is, the folding actuator 40 is configured such that both ends of the folding actuator 40 in the longitudinal direction are folded in the mast (not shown) so that the carriage 41 and the mast 43 can be folded or unfolded with respect to the front body 10 and the rear body 20, 43 and the front body 10, respectively.

Here, the folding actuator 40 employs a conventional hydraulic cylinder or actuator mechanism or device having a structure in which a control signal is transmitted to a driving source such as a compressor in accordance with opening and closing of a switch to operate the cylinder rod by hydraulic or pneumatic pressure, .

The balancing actuator 50 is installed at least one between the front body 10 and the slider 14 so as to determine and move the position of the slider 14 relative to the front body 10 by the elongating and contracting action .

In other words, the balancing actuator 50 is configured to move the slider 14, on which the carriage 41, the fork 42 and the mast 43 are mounted, to the front body 10, Both ends in the longitudinal direction are connected to the front body 10 and the slider 14 by pins.

Here, the balancing actuator 50 employs a conventional hydraulic cylinder or actuator mechanism or device having a structure in which a control signal is transmitted to a driving source such as a compressor according to opening and closing of a switch to operate the cylinder rod by hydraulic or pneumatic pressure, .

The tilting actuator 60 is installed on the rear body 20 so that the inclination of the front body 10 with respect to the rear body 20 can be adjusted by inclining the joint J by extension and contraction.

That is, the tilting actuator 60 has both ends of the tilting actuator 60 in the longitudinal direction so as to be able to tilt the connection state between the front body 10 and the rear body 20 in accordance with the elongation and contraction functions, ), Respectively.

Here, the tilting actuator 60 adopts a conventional hydraulic cylinder or an actuator mechanism or device having a structure that operates by moving forward or backward by transmitting a control signal to a driving source such as a compressor or the like in accordance with the opening and closing of a switch and operating the cylinder rod by hydraulic pressure or air pressure .

14, the outrigger 70 is brought into close contact with the ground surface by a stretching and contracting action of a hydraulic cylinder (hydraulic jack) to prevent the load of the fork 42 lifted from the front body 10 in a link combination.

In other words, the outrigger 70 can secure the load when the fork 42 lifts and lifts the heavy object by supporting the load.

The main operation and operation principle of the folding type remote control forklift according to the embodiment of the present invention will be described as follows.

7, the fork 42 is rotated around the hinge H so as to be brought into close contact with the carriage 41, and then is hooked by the catch 45 to lock the fork 42 The folding actuator 40 is controlled in the extension direction so that the lower portion of the mast 43 is pivoted about the hinge H so as to rotate the front body 10 and the rear body 30, It is possible to minimize the volume by folding down on the car body 20, thereby improving the space efficiency due to a small space occupied by the car.

5, the folding actuator 40 is controlled in the shrinkage direction to move the carriage 41 and the mast (not shown) 43 can be raised with respect to the front body 10 and the locking state of the latch 45 can be released to lift the fork 42 straight horizontally to lift heavy objects such as heavy loads or cargo.

At this time, when the fork 42 rotates about the hinge H and is in a state of being perpendicular to the carriage 41, the periphery of the hinge H is in surface contact with each other, and the horizontally extended state can be firmly maintained.

As shown in FIGS. 3 and 14, when the hydraulic cylinder of the outrigger 70 mounted on both sides of the front body 10 is controlled in the direction of expansion and contraction of the hydraulic cylinder, So that it is possible to prevent the vehicle body from being conducted during this process.

11 and 12, the balancing actuator 50 is controlled to contract so that the carriage 41 and the fork 42 are retracted from the fork 42. In this case, And the mast 43 are moved backward with respect to the front body 10, the load is naturally rearwardly moved, so that the center of gravity can be easily gripped to maintain the stability of the vehicle body, It can be made easily and stably.

9 and 10, the steering actuator 30 is controlled in the elongating and contracting directions to break the space between the front body 10 and the rear body 20 about the axis of the joint J, The direction can be controlled freely.

That is, the front body 10 and the rear body 20 can be divided into two equal parts and connected by a joint J to freely adjust the traveling direction, and a steering actuator The joint 30 between the front body 10 and the rear body 20 is bent by the expansion and contraction action of the steering actuator 30 so that the turning radius of the vehicle body is small, And it is possible to shorten the working time and improve the working efficiency.

In addition, the height of the vehicle body can be minimized as compared with the rear-wheel steering system, thereby minimizing the volume occupied in the cargo vehicle.

15 and 16, the carriage 41 and the mast 43 can be tilted forward or backward at an inclined angle to slide the fork 42 under the heavy object. As a result, It can be carried and lifted or lowered more smoothly and reliably without work.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments or constructions. Various changes and substitutions may be made without departing from the spirit and scope of the invention. It will be obvious to those skilled in the art that the present invention can be widely applied to other embodiments.

Therefore, it is to be understood that modifications and variations of the features of the present invention are intended to be included within the spirit and scope of the present invention.

10: front body 11:
12: knuckle arm 13: guide rail
14: Slider 20: Rear body
21: Driving axle 22: Counterweight
30: Steering actuator 40: Folding actuator
41: carriage 42: fork
43: mast 44: latching hole
45: Clasp 46: Spring
50: Balancing actuator 60: Tilting actuator
70: Outrigger J: Joint

Claims (6)

A front body 10 provided with a flow axle 11;
A rear body 20 connected to the front body 10 by a joint J and provided with a driving axle 21 and a counterweight 22;
A steering actuator (30) installed between the front body (10) and the rear body (20) and for deflecting between the front body (10) and the rear body (20) by a stretching and contracting action to control the moving direction;
A carriage 41 provided on the front side of the front body 10;
A fork 42 connected to the carriage 41 by a hinge so as to be foldable with respect to the carriage 41 and lifting the load;
A mast 43 which can be folded and connected to the front body 10 and the lower portion by a hinge joint and lifts the fork 42 and the carriage 41 at the same time according to the operation of the hydraulic device;
At least one folding actuator (40) installed on the front body (10) and for raising and lowering the carriage (41) and the mast (43) by extension and contraction;
Guide rails (13) provided at both lower portions of the front body (10);
A slider 14 slidably moving along the guide rail 13 while the carriage 41, the fork 42 and the mast 43 are mounted;
At least one balancing actuator (50) provided between the front body (10) and the slider (14) for determining the position of the slider (14) with respect to the front body (10) );
A tilting actuator (60) installed on the rear body (20) and tilting the joint (J) by extension and contraction to adjust the inclination of the front body (10) with respect to the rear body (20); And
An outrigger 70 mounted on both lower portions of the front body 10 to prevent the load of the fork lifted by the hydraulic cylinders from coming into close contact with the ground due to expansion and contraction of the hydraulic cylinder,
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A latching hole 44 is formed in the carriage 41 so as to restrain the fork 42 from being folded with respect to the carriage 41. The latching hole 44 is rotatably inserted into the latching hole 44, (45) for switching the lock and unlock state by contact interference with the fork (42) while the other one of the latches (45) is engaged with the lock A folding telescopic forklift incorporating a spring (46) that provides a resilient return force upon compression to maintain the condition. delete delete delete delete delete

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