KR100600629B1 - Mini crane for vehicle - Google Patents

Abstract

The present invention relates to a mini crane for loading and unloading, which is mounted on a vehicle such as a small freight vehicle, a tractor or a trailer attached to a cultivator, and which is simple in structure and inexpensive, and which can perform the original functions of the crane.

The present invention is a crane that can be loaded and unloaded cargo mounted in the loading box of the vehicle, the crane is connected to the first boom and the second boom to move up and down and the first boom to move up and down and the first boom is connected to the first A first, second, and third pivot shaft for pivoting the boom and the second link member connected between the first boom and the second boom and the first boom, the second boom, and the pivot, to move up and down, and to rotate; A crane unit comprising hydraulic cylinders, a lower base connected to a lower end of the pivot shaft for supporting the crane unit and fixed to the vehicle loading box, and oil pressure generation for supplying hydraulic pressure to the first, second and third hydraulic cylinders. It is characterized by consisting of a device.

Crane, boom, rotating shaft, link, hydraulic cylinder, lower base, hydraulic generator

Description

Mini crane for vehicle loading and unloading {MINI CRANE FOR VEHICLE}

1 is a side view of a state in which a mini crane for loading and unloading mounted on a vehicle according to the present invention is mounted in a vehicle loading box;

Figure 2 is a rear view of a state in which the mini-crane for loading and unloading mounted on the vehicle according to the present invention is mounted in the vehicle loading box.

Figure 3 is a view showing the configuration of the rotating shaft and the third hydraulic cylinder, etc. in the mini crane for up and down loading mounted on the vehicle according to the present invention

Figure 4 (a), (b) is a view showing a process in which the rotating shaft is rotated in the mini crane for up and down loading mounted on the vehicle according to the present invention

5 is a side view of a mini crane for loading and unloading mounted on a vehicle according to the present invention mounted in a vehicle loading box when viewed from a direction different from that of FIG. 1;

6a to 6c is a view showing a process for unloading cargo is loaded mini crane mounted on a vehicle according to the present invention.

* Description of the symbols for the main parts of the drawings *

100 crane portion 10 first boom

11: 1st axis of the first boom 12: 2nd axis of the first boom

13: 1st bracket 20: 2nd boom stand

21: second bracket 30: rotating shaft

31: rotation center axis 32: third bracket

33: support 34: first link

35: second link 40: first hydraulic cylinder

42: 2nd hydraulic cylinder 44: 3rd hydraulic cylinder

45: fourth bracket 50: first link member

52: second link member 50a, 50b, 50c, 52a, 52b, 52c, 52d: connection point

200: lower base 201: rear frame

202: side frame 204: fixing member

205: clamp 300: hydraulic generator

400: loading box

The present invention relates to a mini crane for loading and unloading mounted on a vehicle, and more particularly, is mounted on a vehicle such as a small freight vehicle, a trailer attached to a tractor or a cultivator, and the structure is simple and inexpensive, but the crane performs its original functions smoothly. The present invention relates to a practical mini crane for loading and unloading.

In general, cranes are mechanical devices that transport cargo in up, down, left, and right directions to achieve unloading and lifting operations. They are classified according to the purpose of use, type, and type of movement.

Among these, there is a vehicle mounting crane that is mounted on a vehicle and is easy to move, and a vehicle equipped with such a crane can move quickly, and thus, there is an advantage that a cargo loading and unloading operation can be performed quickly regardless of a place. A crane that can be mounted on a small freight vehicle to load and unload cargo has been proposed.

However, a crane mounted on a conventional small cargo vehicle has a lower base fixed to the bottom of the loading box to support the weight of the crane, a rotating device for rotating the support shaft to unload the cargo to the desired position, and a forward and backward direction. A telescopic boom for moving, a horizontal boom moving up and down, and a wire winch disposed on the horizontal boom to wind and unwind the wire connected to the anchor are needed. Farmers or small businesses that require loading and unloading of small cargoes for use as a problem there was a problem that the crane is very expensive difficult to purchase.

In addition, the crane mounted on the conventional small cargo vehicle inevitably occupies a certain space of the vehicle loading box in order to mount the crane to the vehicle, there is a problem that the utilization of the loading box is reduced, thereby reducing the load capacity of the crane, the crane cargo In order to move to the desired work direction and working point in the loading and unloading, even though it is possible to perform such a function smoothly without using a telescopic boom, a wire winch, etc. There was a problem falling.

An object of the present invention is to devise to solve the above problems, it is mounted on a vehicle, such as a small cargo vehicle, a trailer attached to the tractor or tiller, and the structure is simple and inexpensive, but can perform the original function of the crane smoothly The present invention provides a practical mini crane for loading and unloading.

In order to achieve the above object, the mini crane for loading and unloading mounted on a vehicle according to the present invention is mounted on a loading box of a vehicle, and a crane capable of loading and unloading cargo, wherein the crane is a first boom and a vertical boom to perform the front and rear operation. A second shaft member connected to a lower portion of the first boom and the first boom, which is operated, and a second link member connected between the first boom and the second boom and the first boom and the second boom; A lower portion connected to a lower end of the rotating shaft for supporting the crane portion and fixing it to the vehicle loading box, and a crane portion including first, second, and third hydraulic cylinders that move the boom and the rotating shaft back and forth, and up and down, And a hydraulic generator for supplying hydraulic pressure to the base and the first, second and third hydraulic cylinders.

In addition, the present invention is characterized in that it further comprises a first link member between the first boom and the rotating shaft.

In addition, the present invention is characterized in that the first boom is composed of a first axis and a second axis.

In addition, the present invention is characterized in that the second link member has four connection points.

In addition, the present invention is characterized in that the rotating shaft is rotated 180 degrees by the stretching operation of the third hydraulic cylinder.

In addition, the present invention is the rotation shaft is installed on one side of the loading box rear of the vehicle, the lower base is installed along the both sides and the loading box rear of the vehicle is a 'c' shaped frame, the frame installed on both sides of the lower base The size of the cross section is characterized in that it is formed to become smaller from the rear of the loading box toward the inside.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

1 is a side view of the state of the mini-mounted crane mounted on the vehicle loading box mounted on the vehicle according to the present invention, Figure 2 is a rear view of the state of the mini-mounted crane mounted on the vehicle loading box mounted on the vehicle according to the present invention 3 is a view showing the configuration of the rotating shaft and the third hydraulic cylinder, etc. in the up and down mini-crane mounted on the vehicle according to the present invention, Figure 4 (a), (b) is in accordance with the present invention FIG. 5 is a view illustrating a process in which a rotation shaft is rotated in a mini crane for up and down vehicles mounted on a vehicle, and FIG. 5 is a view illustrating a state in which the mini crane for up and down vehicles mounted on a vehicle is mounted on a vehicle loading box in a direction different from that of FIG. 1. 6A to 6C are views illustrating a process of unloading cargo by a mini crane for loading and unloading mounted on a vehicle according to the present invention.

As shown in Figures 1 to 3, the mini crane for loading and unloading mounted on the vehicle according to the present invention, the crane base 100 for loading and unloading the load and the lower base 200 for fixing the crane unit in the vehicle loading and It can be divided into a hydraulic generator 300 for supplying hydraulic pressure to the hydraulic cylinder.

The crane portion 100 includes a first boom 10 that performs front and rear motion, a second boom 20 that is provided with a hook 21 at the front end, and moves up and down, and a lower portion of the first boom 10. It is connected to the rotating shaft 30 for rotating the first boom 10, the first hydraulic cylinder 40 for moving the first boom 10 back and forth, and the second boom 20 is moved up and down The second hydraulic cylinder 42 to be rotated, and the third hydraulic cylinder 44 to rotate the rotating shaft 30, the first boom 10 and the rotating shaft 30 is a first link member ( 50 is interposed therebetween, and the first boom 10 and the second boom 20 are connected with the second link member 52 interposed therebetween.

The first link member 50 transmits the rotational force of the rotating shaft 30 connected to the lower portion to the first boom 10, the upper portion of the first link member 50, the first boom 10 The two connecting points 50a and 50b are provided to smoothly move forward and backward. The connection point 50a is connected to the first shaft 11 of the first boom, and the connection point 50b is connected to the second axis 12 of the first boom. A first bracket 13 for engaging with one end of the first hydraulic cylinder 40 is provided at the center upper portion of the first shaft 11 of the first boom 10, and the first boom 10 The lower end of the second shaft 12 and the connection point 50b of the) is coupled to the end of the expansion bar of the first hydraulic cylinder (40).

Here, the first boom 10 may be directly coupled to the pivot shaft 30 without the first link member 50.

The second link member 52 serves to couple the first boom 10 to the second boom 20, and the front and rear movement of the first boom 10 and the vertical movement of the second boom smoothly. Four connection points 52a, 52b, 52c, and 52d are provided for this purpose.

The connection point 52a is connected to the lower end of the second boom 20, and the connection point 52b is coupled to one end of the second hydraulic cylinder 42 and the second boom 20 The upper part of the center is provided with a second bracket 21 for engaging with one end of the second hydraulic cylinder 42. The connection point 52c is connected to the upper end of the first shaft 11 of the first boom, and the connection point 52d is connected to the upper end of the second shaft 12 of the first boom.

The rotating shaft 30 has a rectangular columnar shape, and has upper and lower end portions having a first engaging piece 36 extending in an arc shape so as to be coupled to the rotating center shaft 31. In addition, the other end of the rotation shaft 30 is provided with a second engaging piece 37 extending in an arc shape in order to receive the stretching force of the third hydraulic cylinder (44).

The pivot center shaft 31 is fixed to the third bracket 32 fixed to the support 33 supported on the rear frame 201 of the lower base 200.

Meanwhile, one end of the third hydraulic cylinder 44 is connected to the fourth bracket 45 fixed to the rear frame 201 of the lower base 200 and extends and contracts the extension bar of the third hydraulic cylinder 44. The end is connected with the ends of the first link 34 and the second link 35. The first link 34 is coupled to the end of the expansion bar of the third hydraulic cylinder 44 serves to transmit a linear motion due to the expansion and contraction of the expansion bar. The other end of the first link 34 is connected to the second coupling piece 37 of the pivot shaft 30, and the other end of the second link 35 is connected to the other end of the third bracket 32. It is coupled to one side.

Next, the structure of the lower base 200 for fixing the crane unit 100 to the loading box of the vehicle will be described.

The lower base 200 is fixed to the crane unit 100 while the side of the rear frame is installed along both sides of the rear frame 201 and the loading box in the rear of the loading box in order to secure more storage space of the loading box of the vehicle. It is formed into a frame 202. That is, the lower base 200 is formed of a 'c' shaped frame.

The rear frame 201 is firmly fixed to the lower portion of the loading box 400 of the vehicle with a clamp 205, and one end of the side frame 202 with a fixing member 204 such as a clamp or a U bolt, etc. It is firmly fixed to the lower of the loading box (400).

In addition, the side frame 202 of the lower base 200 is a vehicle loading rear end portion, which is a heavily loaded portion in order to better adapt the load of the cargo and crane portion 100 and reduce the weight, the size of the cross section is large And the less load is formed in a shape that reduces the size of the cross section.

That is, the side frame 202 is formed such that the size of the cross section is smaller from the rear of the vehicle loading box 400 toward the inside of the loading box.

Hereinafter, referring to FIGS. 4A and 4B, a process of rotating the pivot shaft in a mini crane for up and down loading mounted on a vehicle according to the present invention will be described.

4 (a) is a view showing a state in which the third hydraulic cylinder 44 is extended to the maximum extension bar, as shown in (a) of FIG. 4 is the expansion bar of the third hydraulic cylinder (44) As the second link piece 37 of the pivot shaft 30 coupled to the other end of the first link 34 is rotated as the first link 34 extends to the right and is connected to the end of the elastic bar. As a result, the pivot shaft 30 is rotated clockwise about the pivot center shaft 31 so as to be parallel to the rear frame 201 of the lower base 200.

Then, when the third hydraulic cylinder 44 shrinks the expansion bar, the first link 34 connected to the end of the expansion bar rotates left and the rotation shaft coupled to the other end of the first link 34 ( Since the second engagement piece 37 of 30) rotates in a counterclockwise direction, the rotation shaft 30 also rotates in a counterclockwise direction about the rotation center axis 31.

4 (b) is a view showing a state in which the third hydraulic cylinder (44) reduced the expansion bar to the maximum, as shown in (b) of FIG. 4, the third hydraulic cylinder (44) maximizes the expansion bar. When it is reduced to, the first link 34 connected to the end of the elastic bar is advanced to be in line with the elastic bar, and the first link 34 and one surface of the second link 35 coupled to the elastic bar are The rear frame 201 of the lower base 200 is touched so that it no longer moves. At this time, the rotating shaft 30 is rotated counterclockwise around the rotating center shaft 31 so that the rotating shaft 30 has the hydraulic cylinder at the rear frame 201 of the lower base 200 to the maximum. It is positioned parallel to the opposite direction as when stretched.

By the expansion and contraction operation of the third hydraulic cylinder 44 as described above the maximum rotation range of the rotating shaft 30 can be rotated approximately 180 degrees.

That is, the mini-crane for up and down vehicle mounted on the vehicle according to the present invention is able to rotate about 180 degrees instead of 360 degrees, so that the maximum rotation range of the rotation shaft 30 can work on one side and the rear of the vehicle loading box. .

This is because the crane shaft 100 is installed in the loading box of the vehicle, the rotation shaft does not rotate, so that the balance can be maintained even when the cargo loading and unloading work.

If necessary, the shape of the first link 34 and the second link 35 may be changed to set the maximum rotation range of the rotation shaft 30 to a specific range between 90 degrees and 270 degrees.

In addition, the present invention may be further provided with an outrigger (Outrigger) for supporting the crane on the ground in order to ensure the stability during cargo unloading work.

FIG. 5 is a side view of a vehicle equipped with a mini crane for loading and unloading mounted on a vehicle loading box 400 viewed from a direction different from that of FIG. 1, and as shown in FIG. The generator 300 is provided. The hydraulic generator 300 may be installed in the loading box 400 of the vehicle, but the hydraulic generating device 300 is loaded as shown in FIG. 5 because it is efficient to use the space of the loading box. It is preferable to install in the lower part of 400.

Hereinafter, a process of unloading cargo by a mini crane for loading and unloading mounted on a vehicle according to the present invention will be described with reference to FIGS. 6A to 6C.

6A to 6C are views showing a process of unloading cargo by the mini crane for loading and unloading mounted on the vehicle according to the present invention, and FIG. 6A shows the cargo located on the left side of the vehicle at the tip of the second boom 20. Figure 6b shows a state of working on the hook 21, which is shown in Figure 6b is a state of lifting the cargo hanging on the hook 21, Figure 6c is a cargo hanging on the hook 21 It shows the state loaded on the loading box of the vehicle.

As shown in FIG. 6A, the second boom 20 may be moved to a point where the cargo is located in order to hang the cargo on the hook 21 at the tip of the second boom 20. To this end, the third hydraulic cylinder 44 may be operated to rotate the pivot shaft 30 to rotate the first boom 10 and the second boom 20 to a position where the cargo is located. Thereafter, the second hydraulic cylinder 42 is operated to lower the second boom 20 to move to a position suitable for hanging a load on the hook 21. In this case, if necessary, the inclination of the first boom 10 may be adjusted by moving back and forth of the first boom 10.

As shown in FIG. 6B, in order to lift the cargo, the second boom 20 may be raised. In this case, the second hydraulic cylinder 42 may be operated to extend the expansion bar of the second hydraulic cylinder 42. . In this case, if necessary, the inclination of the first boom 10 may be adjusted by moving back and forth of the first boom 10.

In order to load the lifted cargo as shown in FIG. 6C, the first hydraulic cylinder 40 is moved to the right position by operating the first hydraulic cylinder 40 and then the second hydraulic cylinder. It is sufficient to operate the 42 to lower the second boom 20.

On the other hand, when getting off the cargo loaded in the loading box of the vehicle may proceed in the reverse order of the above method.

As described above, the mini crane for loading and unloading mounted on the vehicle according to the present invention is a simple structure that can be unloading operation to smoothly load and unload cargo without a stretch boom, winch provided in a conventional vehicle crane.

While the foregoing has been described with reference to preferred embodiments of the present invention, those skilled in the art will be able to variously modify and change the present invention without departing from the spirit and scope of the invention as set forth in the claims below. It will be appreciated.

The mini crane for loading and unloading mounted on the vehicle according to the present invention limits the rotation range of the rotational shaft by approximately 180 degrees and can maintain the balance even when unloading and unloading the cargo, and moves the boom up and down and up and down. In order to move to the desired work direction and work point in loading and unloading, it is possible to perform a function smoothly without using a telescopic boom or a wire winch, so the structure is simple and inexpensive, and it is a mini crane that can perform the original functions of the crane smoothly. The advantage is that it can be produced.

Claims (8)

In the crane that can be loaded and unloaded cargo mounted on the loading box of the vehicle, The crane is connected between the first boom and the second boom to move up and down and the first boom and the bottom and the first boom to move the first boom and the first boom and the second boom is connected between the first and second boom A crane part comprising first, second, and third hydraulic cylinders for moving the second link member, the first boom, the second boom, and the pivot back and forth, up and down, and rotating; A lower base connected to a lower end of the rotation shaft for supporting the crane unit and fixing the crane compartment; Up and down mini crane for mounting on a vehicle, characterized in that consisting of a hydraulic generator for supplying hydraulic pressure to the first, second, third hydraulic cylinder. 2. The mini crane for loading and unloading the vehicle according to claim 1, further comprising a first link member between the first boom and the pivot shaft. The mini crane for loading and unloading a vehicle according to claim 1, wherein the first boom comprises a first shaft and a second shaft. The mini crane for loading and unloading the vehicle of claim 1, wherein the second link member has four connection points. The mini crane for loading and unloading a vehicle according to claim 1, wherein the pivot shaft is rotated 180 degrees by the expansion and contraction operation of the third hydraulic cylinder. The mini crane according to claim 1, wherein the pivot shaft is installed at one side of the rear of the vehicle's loading box. 7. The mini crane according to claim 6, wherein the lower base is installed along the rear and both sides of the loading box of the vehicle to form a '-' frame. 8. The mini crane according to claim 7, wherein the size of the frame section provided on both side surfaces of the lower base is formed to be smaller from the rear of the loading box toward the inside.

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