KR102329585B1 - A magnetic chuck for excavator - Google Patents

Abstract

The present invention relates to a chuck body 20 provided with a bracket 10 connected to a boom of a heavy-duty vehicle, a core 30 installed at the inner center of the chuck body 20, and a coil unit installed to be wound around the core 30 It relates to a high-performance electronic chuck mounted on a heavy-duty vehicle comprising (40) and a bottom plate (50) welded to the bottom of the chuck body (20) so that the coil unit (40) is embedded, the chuck body (20) comprising an iron plate A developed view 20' having a square-shaped upper surface 25' and first and second side surfaces 21' and 22' extending from opposite sides of the upper surface 25', and an iron plate cutting into third and fourth side surfaces 23' and 24' of sizes corresponding to the first and second side surfaces 21' and 22'; bending the first and second side surfaces 21' and 22' in the direction at right angles to the upper surface 25'; The third and fourth side surfaces 23' and 24' are sandwiched at both ends between the upper surface 25' and the first and second side surfaces 21' and 22', and then the surfaces that are in close contact with each other are welded. It is characterized in that it is manufactured by

Description

High-performance electromagnetic chuck for heavy-duty vehicle mounting

The present invention relates to an electronic chuck for mounting on a heavy-duty vehicle installed and used in a heavy-duty vehicle such as a fork crane, and more particularly, can generate a large magnetic force while enabling light weight, and can improve productivity by simplifying the manufacturing process , An object of the present invention is to provide a high-performance electronic chuck for mounting on heavy equipment vehicles.

The electromagnetic chuck is installed and used on the boom of a crane vehicle or a fork crane vehicle, and is for moving an iron object after attaching it using magnetic force.

1 is a perspective view of a conventional electronic chuck for mounting on a heavy equipment vehicle, FIG. 2 is a cross-sectional view taken along the line II-II' of FIG. 1, and FIG. 3 is an exploded perspective view showing the chuck body of FIG.

As shown, the conventional electronic chuck for mounting on a heavy equipment vehicle includes a chuck body 2 provided with a bracket 1 connected to a boom of a heavy equipment vehicle, and a core 3 installed at the inner center of the chuck body 2 and , a coil unit 4 installed to be wound around the core 3, a bottom plate 5 welded to the bottom of the chuck body 2 so that the coil unit 4 is built-in, and the chuck body 2 coupled to the lower end and a square ring 6 to be welded, and a molding resin 7 filled between the chuck body 2 and the bottom plate 5 to fix the coil unit 4 in position.

Here, the chuck body 2 cuts the iron plate into a rectangular top plate 2e and four side plates 2a, 2b, 2c, 2d, and then the top plate 2e. The four side plates 2a, 2b, 2c, and 2d were sequentially welded and connected to the bottom edge of the . Accordingly, as shown in FIG. 1, side welding ends 6 for interconnection were formed on the sides of the four side plates 2a, 2b, 2c, and 2d. In addition, between the upper plate 2e and the side plates 2a, 2b, 2c, and 2d, a support welding end W for interconnection was formed.

In such an electromagnetic chuck, when DC power is applied to the coil unit 4, a magnetic field is formed between the core 3 and the chuck body 2, and the chuck body rim and the core 3 at the bottom of the chuck body 2 N poles and S poles are formed to adsorb iron objects.

On the other hand, the electronic chuck has a weight of approximately 500kg, and the weight of the chuck body (2) and the core (3) made of cast iron reaches about 200 to 300Kg, and the coil unit (4), the bottom plate (5), the square The ring (6) and the molding resin (7) reach the rest of the weight. Therefore, when the electronic chuck is suspended from the vehicle boom by the bracket 1, the upper plate 2a constituting the chuck body 2 must support most of the weight (400-500Kg) of the electronic chuck.

For this reason, when manufacturing the chuck body 2 , as shown in FIG. 2 , a square top plate 2e is manufactured by cutting an iron plate having a thickness of 24 mm (T1), and an iron plate having a thickness of 16 mm (T2) is cut. After cutting and producing four side plates 2a, 2b, 2c, and 2d, the side plates 2a, 2b, 2c, and 2d are adhered to the bottom edge of the top plate 2e and welded. The chuck body 2 is manufactured in which the upper plate 2e and the side plates 2a, 2b, 2c, and 2d are three-dimensionally connected. Due to the chuck body 2, a welding area is formed between the upper plate 2e and the side plates 2a, 2b, 2c, and 2d, so that the upper plate 2e is connected to the side plates 2a, 2b, 2c. ) (2d) can support a large load applied.

However, since the electronic chuck is used and stored outdoors, the upper plate 2e and the side plates 2a, 2b, 2c, and 2d are separated by repeated contraction and expansion due to temperature changes caused by seasons and tides. Stress is accumulated at the welding end (W) to be connected, and the stress is further increased at the welding end (W) by the impact applied during use. Accordingly, when the electromagnetic chuck is used for a long time, cracks are gradually generated at the welding end W connecting the upper plate 2e and the side plates 2a, 2b, 2c, and 2d, leading to deterioration of durability.

In addition, cracks that gradually increase at the weld end (W) lead to loss of magnetic moment inside the chuck body, leading to loss of magnetic field. Accordingly, the magnetic force for adsorbing the iron object gradually decreased.

In addition, in order to form a welding end W for support connecting the upper plate 2e) and the side plates 2a, 2b, 2c, and 2d, the side plates 2b, 2c, 2d, and 2e In the process of manufacturing the chuck body (2), it was necessary to post-process the contact surface to be completely flat, and in the process of manufacturing the chuck body (2), high-level welding technology was required to prevent excessive welding beads from being generated in the process of forming the support welding end (W). Time and effort were required.

And, in order to support a large load, the upper plate 2e and the side plates 2a, 2b, 2c, and 2d have to be manufactured with thick steel plates T1 and T2, so the problem is that a lot of manufacturing cost is generated. there was.

The present invention was created to solve the above problems, and when the chuck body is manufactured, the welding end for support connecting the upper plate and the first, second, third, and fourth side plates is not formed so that cracks are not generated. An object of the present invention is to provide a high-performance electronic chuck mounted on a heavy-duty vehicle capable of maintaining a constant magnetic force even over time.

Another object of the present invention is to provide a high-performance electronic chuck mounted on a heavy-duty vehicle capable of increasing productivity by lowering the manufacturing cost by simplifying the manufacturing process while being lightweight.

In order to achieve the above object, a high-performance electronic chuck for mounting on a heavy equipment vehicle according to the present invention includes a chuck body 20 having a bracket 10 connected to a boom of a heavy equipment vehicle installed therein, and the chuck body 20 inside the center A core 30 installed in the core 30, a coil unit 40 installed to be wound around the core 30, and a bottom plate 50 welded to the bottom of the chuck body 20 so that the coil unit 40 is embedded. In the electronic chuck that does this, the chuck body 20 includes an upper surface 25' of a square shape and first and second side surfaces 21' extending from opposite surfaces of the upper surface 25'. (22') and the iron plate is cut into third and third side surfaces 23' and 24' having sizes corresponding to the first and second side surfaces 21' and 22', and the When the horizontal and vertical widths of the upper surface 25' are defined as D and the thickness of the iron plate is defined as T, the long width of each of the third and fourth side surfaces 23' and 24' is D-2T Have a development diagram 20' that is the relationship of; After bending the first and second side surfaces 21' and 22' in a direction perpendicular to the upper surface 25', the upper surface 25' and the first and second side surfaces 21', 22 '), the third and fourth side surfaces 23' and 24' are inserted in close contact at both ends between By welding between the (23') and (24'), the first, second, third, and fourth side plates 21, 22, 23, and 24 that are three-dimensionally connected to the four sides of the upper plate 25 are formed, ; the upper plate 25 and the first and second side plates 21 and 22 have the same thickness; a bent end 27 is formed between the upper plate 25 and the first and second side plates 21 and 22 so that a magnetic field passes without loss; The first, second, third and fourth side plates 21, 22, 23, and 24 are wrapped around the first, second, third and fourth side plates 21, 22, 23, and 24 on four sides. ) that includes a square ring (60) that is welded to the lower end;

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According to the present invention, it is possible to prevent a magnetic field loss that may occur when a crack exists in the welded portion by not having a welded portion between the upper plate 25 and the first and second side plates 21 and 22, Therefore, it is possible to implement a high-performance electronic chuck that can generate a large magnetic force consistently even over time.

In addition, since the first and second side plates 21 and 22 form one body with the upper plate 25, the thickness of the upper plate does not need to be thicker than that of the first and second side plates as in the conventional electronic chuck, thereby reducing the weight. It is possible to increase productivity by omitting the welding process between the upper plate 25 and the first and second side plates 21 and 22) to lower the manufacturing cost.

1 is a perspective view of a conventional electronic chuck for mounting a heavy equipment vehicle;
2 is a cross-sectional view taken along line II-II' of FIG. 1;
Figure 3 is an exploded perspective view showing the chuck body of Figure 2,
4 is a perspective view of a high-performance electronic chuck for mounting on a heavy-duty vehicle according to the present invention;
5 is a cross-sectional view taken along the line V-V' of FIG. 4;
6 is an exploded view of the chuck body of FIG. 4;
7 is a perspective view of the chuck body implemented by bending and assembling the development view of FIG. 6;
FIG. 8 is a view for explaining that first, second, third, and fourth side plates constituting the electronic chuck of FIG. 4 are welded;

Hereinafter, a high-performance electronic chuck for mounting on a heavy-duty vehicle according to the present invention will be described in detail with reference to the accompanying drawings.

Hereinafter, what is described as "upper" or "upper" may include not only those directly above in contact, but also those above in non-contact. Terms such as first, second, etc. may be used to describe various elements, but the elements should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another. The singular expression includes the plural expression unless the context clearly dictates otherwise. In addition, when a part "includes" a certain component, this means that other components may be further included rather than excluding other components unless otherwise stated. In addition, terms such as "...unit" and "module" described in the specification mean a unit that processes at least one function or operation. In addition, in the drawings, the size of the components may be exaggerated or reduced for convenience of description. For example, since the size and thickness of each component shown in the drawings are arbitrarily indicated for convenience of description, the present invention is not necessarily limited to the illustrated bar.

4 is a perspective view of a high-performance electronic chuck mounted on a heavy equipment vehicle according to the present invention, and FIG. 5 is a cross-sectional view taken along the line V-V' of FIG. 4 .

As shown, the high-performance electronic chuck for mounting on a heavy-duty vehicle according to the present invention includes a chuck body 20 having a bracket 10 connected to a boom of a heavy-duty vehicle installed, and a core installed in the center of the chuck body 20 . 30, a coil unit 40 installed to be wound around the core 30, a bottom plate 50 welded to the bottom of the chuck body 20 so that the coil unit 40 is embedded, and the chuck body 20 ) and a square ring 60 coupled to and welded to the lower end, and a molding resin 70 filled between the chuck body 20 and the bottom plate 50 to fix the coil unit 40 in position. Here, the chuck body 20 and the core 30 are made of a ferromagnetic material, for example, a cast iron material, and the bottom plate 50 is made of a paramagnetic material, for example, a stainless material.

The core 30 is fixed to the center of the chuck body 20 by welding, and the coil unit 40 has a ring shape as a whole and is inserted into the core 30 inside the chuck body 20 . Since the core 30 and the coil unit 40 are components generally used in the art, further detailed description will be omitted.

The square ring 60 is fixed by welding after being fitted on the bottom edge of the chuck body 20, and the width of the edge of the chuck body 20 is increased to increase the space where the iron object can be adsorbed, and also Prevents the bottom edge of the electromagnetic chuck from being damaged by the impact applied during the work process.

Figure 6 is an exploded view of the chuck body of Figure 4, Figure 7 is a perspective view of the chuck body implemented by bending and assembling the development view of Figure 6, Figure 8 is the first, second, third, It is a diagram for explaining that the 4 side plates are welded

The chuck body 20 is implemented by cutting an iron plate of a certain thickness, in this embodiment, an iron plate having a thickness of 12 mm, and then bending it. In order to manufacture such a chuck body 20, as shown in FIG. 16, the first and second side portions extending from opposite surfaces of the upper surface 25' of the square shape and the upper surface 25' of the iron plate as shown in FIG. It is cut in a developed view 20' having surfaces 21' and 22'. In addition, the third and fourth side surfaces 23' and 24' of the iron plate corresponding to the first and second side surfaces 21' and 22' are cut.

Next, the first and second side surfaces 21' and 22' are bent at right angles to the upper surface 25'.

Next, as shown in FIG. 7, the third and fourth side surfaces 23' and 24' are formed at both ends between the upper surface 25' and the first and second side surfaces 21' and 22'. Weld the surfaces that are in close contact with each other after sandwiching them. By this series of steps, the upper plate 25 and the first, second, third, and fourth side plates 21, 22, 23, and 24 connected three-dimensionally from the upper plate 25 are raised to the chuck body. (20) is completed.

In the chuck body 20, the upper plate 25 and the first and second side plates 21 and 22 have the same thickness because they are formed by bending one iron plate.

This will be described in more detail as follows.

In the development view 20' for manufacturing the chuck body 20, when defining the horizontal and vertical widths of the upper surface 25' having a square shape as D, and defining the thickness of the iron plate as T, in FIG. As shown, the long width at each of the third and fourth side surfaces 23' and 24' is D-2T. That is, according to the above relationship, the long widths of the first and second side surfaces 21' and 22' are 2T greater than the long widths of the third and fourth side surfaces 23' and 24'.

According to the developed view 20', the first and second side surfaces 21' and 22' are bent in a right angle direction, and then, the third and third side surfaces 23' and 24' are formed with the upper surface 25. ') and the first and second side surfaces 21' and 22' to be sandwiched in close contact with each other, and then the upper surface 25' and the first and second side surfaces 21' and 22' and the second The chuck body 20 can be completed by forming the side welding ends 26 for interconnection on the side surfaces of the 3 and 4 side plates 23 and 24 .

On the other hand, in the chuck body 20, the bending end 27 is formed between the upper plate 25 and the first and second side plates 21 and 22 so that the magnetic field passes without loss. The bent end 27 can minimize the magnetic field loss by forming a curved surface when the magnetic field generated by the coil unit 40 is formed between the first and second side plates 21 and 22 in the upper plate 25 and , thereby maximizing the magnitude of the magnetic force between the chuck body rim and the core 30 at the bottom of the chuck body 20 .

As described above, according to the present invention, the chuck body 20 includes an iron plate with a rectangular top surface 25 ′ and first and second side surfaces 21 ′ and 22 ′, and first and second side surfaces 21 . ') (22') after cutting in a developed view consisting of the third and fourth side surfaces 23' and 24' of the size corresponding to the ') (22'), the first, second, third, and fourth side surfaces 21', 22 Since it is implemented by bending and welding the '), 23', and 24' from the upper surface 25', the welding area between the upper plate 25 and the first and second side plates 21 and 22 can be eliminated. Accordingly, it is possible to prevent cracks from being generated between the upper plate 25 and the first and second side plates 21 and 22 even with temperature changes caused by seasons and tides.

Therefore, it is possible to prevent the loss of the magnetic field as described above by not having a welding portion between the upper plate 25 and the first and second side plates 21 and 22, and to generate a large magnetic force constantly even over time. A high-performance electronic chuck can be implemented.

In addition, since the first and second side plates 21 and 22 form one body with the upper plate 25, the thickness of the upper plate does not need to be thicker than that of the first and second side plates as in the conventional electronic chuck, thereby reducing the weight. It is possible to increase productivity by omitting the welding process between the upper plate 25 and the first and second side plates 21 and 22) to lower the manufacturing cost.

Although the present invention has been described with reference to one embodiment shown in the drawings, which is only exemplary, those skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom.

10 ... Bracket 20 ... Chuck body
21,22,23,24 ... 1,2,3,4 side plates 21',22',23',24' ... 1,2,3,4 side plates
25 ... top plate 25' ... top surface
26 ... side weld end 27 ... bend end
30 ... core 40 ... coil unit
50 ... base plate 60 ... square ring
70 ... molding resin

Claims (4)

A chuck body 20 provided with a bracket 10 connected to the boom of a heavy-duty vehicle, a core 30 installed in the center of the chuck body 20, and a coil unit installed to be wound around the core 30 ( In the electronic chuck comprising: 40) and a bottom plate 50 welded to the bottom of the chuck body 20 so that the coil unit 40 is embedded therein,
The chuck body 20,
An iron plate is formed with a square-shaped upper surface 25' and first and second side surfaces 21' and 22' extending from opposite surfaces of the upper surface 25', and an iron plate is placed on the first and second side surfaces. As implemented by cutting the third and fourth side surfaces 23' and 24' of the size corresponding to the surfaces 21' and 22', the horizontal and vertical widths of the upper surface 25' are D. When defining the thickness of the iron plate as T, the long width of each of the third and fourth side surfaces 23' and 24' has a developed view 20' that is a relation of D-2T;
After bending the first and second side surfaces 21' and 22' in a direction perpendicular to the upper surface 25', the upper surface 25' and the first and second side surfaces 21', 22 '), the third and fourth side surfaces 23' and 24' are inserted in close contact at both ends between By welding between the (23') and (24'), the first, second, third, and fourth side plates 21, 22, 23, and 24 that are three-dimensionally connected to the four sides of the upper plate 25 are formed, ;
the upper plate 25 and the first and second side plates 21 and 22 have the same thickness;
a bent end 27 is formed between the upper plate 25 and the first and second side plates 21 and 22 so that a magnetic field passes without loss;
The first, second, third and fourth side plates 21, 22, 23, and 24 are wrapped around the first, second, third and fourth side plates 21, 22, 23, and 24 on four sides. ) that includes a square ring (60) that is welded to the lower end; delete delete delete

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