KR200417137Y1 - Hinge structure of motor control center unit door - Google Patents

Abstract

The present invention discloses a hinge structure of a motor control center (MCC) unit door. The disclosed subject matter includes a body hinge having one end fixed to the body frame; And a door hinge fixed to the outside of the unit door and rotatably coupled to the other end of the main body hinge by a hinge pin.

According to the present invention, by adopting the outer hinge structure coupled to the outside of the door to strengthen the durability, it prevents the damage of the hinge neck portion as in the conventional, and there is an effect of preventing the sag caused by the door weight after mounting the unit door Due to this sag prevention, the upper, lower, left, and right levels of the door after assembly are matched to prevent rework and quality claims due to poor machining and assembly tolerances. In addition, by changing the assembly method to the bolt fastening method, there is an effect of eliminating any problems such as damage to the parts due to welding, shortening the processing time and improving the assembly.

Description

HINGE STRUCTURE OF MOTOR CONTROL CENTER UNIT DOOR}

1 is a cross-sectional view showing a hinge structure of a conventional motor control center unit door.

FIG. 2 is a sectional view of the hinge shown in FIG. 1 and a side view thereof. FIG.

Figure 3 is a cross-sectional view showing the hinge structure of the motor control center unit door according to an embodiment of the present invention.

4 is a sectional view and a front view of the hinge shown in FIG.

5 is an exploded view of the hinge structure of FIG.

Figure 6 is a photograph showing a state in which the hinge structure of Figure 3 is applied / mounted.

<Description of the symbols for the main parts of the drawings>

110: body hinge 120: door hinge

130: hinge pin

F: Body Frame D: Unit Door

The present invention relates to a hinge structure, and more particularly to a hinge structure used when opening and closing the unit door of the motor control center (MCC).

In general, the switchgear is an electrical equipment that safely supplies industrial power to the user. The motor control center (MCC), to which the present invention is applied, is used to securely insulate and store the electric devices that control the motor in a steel enclosure. Product.

In the enclosure of the motor control center, up to 13 motor control units can be built in each unit, and each unit has electrical equipment housed in the main circuit (power supply side) and control circuit (device operation wiring). It is in the form of steel box for connection and control. The unit uses the 1st and 2nd and 3rd clips to supply and receive power, where the unit door is opened and closed before the unit is removed from each clip. Hinges are used for this purpose. The opening and closing of the unit doors is performed periodically by the site operator for maintenance and inspection of the unit or when a problem occurs.

1 is a cross-sectional view illustrating a hinge structure of a conventional motor control center unit door. As shown in FIG. 1, a conventional hinge structure includes a hinge 10 and a hinge ring 20 coupled to a unit door D. It includes. The hinge 10 is mounted to the body frame F by a predetermined fastening means, and the hinge ring 20 is assembled to the hinge 10 after being joined to the unit door D by welding. At this time, the maximum swing angle of the unit door (D) is 110 degrees.

However, such a hinge structure of the conventional motor control center unit door has a weak neck portion 10a (see FIG. 2) of the hinge, so that a crack occurs in the hinge neck portion when the unit door is opened and closed several times. There was this.

In addition, the hinge ring is coupled to the unit door by welding so that the hinge ring is damaged during the hinge assembly, resulting in a delay in work time due to reworking, painting, and reassembly.

In addition, the durability of the hinge structure is low, so that the bending shape is generated by the weight of the unit door, and the left, right, and top and bottom levels of the door are not matched, resulting in deterioration of the quality of the product. There was a problem that the position of the O / P handle and the decorative plate is different and may cause poor assembly.

Therefore, the present invention is devised to solve such problems of the prior art, the object of the present invention is to change from the conventional inner hinge structure to the outer hinge structure to prevent damage due to the weakness of the hinge neck, unit door (D) eliminates the process of welding the hinge ring and provides a hinge structure of the door of the motor control center unit by shortening the machining time and improving the assembly by the bolt coupling structure.

Hinge structure of the motor control center (MCC) unit door of the present invention for achieving the above object,

A main hinge whose one end is fixed to the main frame;

And a door hinge fixed to the outside of the unit door and rotatably coupled to the other end of the main body hinge by a hinge pin.

The door hinge is preferably coupled to the unit door by bolts.

Preferably, the 'c' shaped hinge support is coupled between the door hinge and the bolt.

Hereinafter, a preferred embodiment of the present invention with reference to the drawings in detail.

Figure 3 is a cross-sectional view showing a hinge structure of the motor control center unit door according to an embodiment of the present invention, Figure 4 is a cross-sectional view and front view of the hinge shown in Figure 3, Figure 5 is an exploded assembly of the hinge structure of Figure 3 It is a figure which shows a figure. On the other hand, Figure 6 is a photograph showing a state that the hinge structure of Figure 3 is applied / mounted.

Referring to Figure 3, the hinge structure of the motor control center unit door according to an embodiment of the present invention, the main body hinge 110 is fixed to the main frame (F), and is fixed to the outside of the unit door (D) It includes a door hinge 120, the main body hinge 110 is rotatably coupled by the door hinge 120 and the hinge pin 130.

The main hinge 110 is formed in a 'b' shape is coupled to the main body frame (F) by a predetermined fastening means, the receiving end so that the hinge pin 130 is inserted into the other end of the end ( 110b) is formed.

The body hinge 110 is preferably made of HP-1 (hot rolled steel sheet) to ensure rigidity, and may be made of a material such as SCP-1 (cold rolled steel sheet) or AlDC (aluminum die casting).

The door hinge 120 is an external hinge type coupled to the outer surface of the unit door D, as shown in FIG. 4, so that the other end of the main hinge 110 can be fitted at one end thereof. An accommodating part 120a cut inward is provided, and an accommodating hole 120b is formed to communicate with the main body hinge 110 and the hinge pin 130 above and below the accommodating part 120. . In addition, the door hinge 120 is formed to protrude a bolt receiving portion 121 in the center.

Referring to FIG. 3 again, the door hinge 120 is attached to the outer surface of the unit door D and then fixed to the unit door D by fastening the bolt B and the bolt receiving portion 121. . In addition, between the door hinge 120 and the bolt B, it is preferable that the 'c'-shaped hinge support 140 is inserted into the coupling to increase the fixing force of the bolt B.

The door hinge 120 is preferably made of ZnDC (zinc die casting) material to ensure rigidity, but in this case, it is possible to change the material to SCP-1 (cold rolled steel sheet) or AlDC (aluminum die casting).

5, the main body hinge 110 is fitted to the receiving portion 120a of the door hinge 120 is coupled by the hinge pin 130 to form a module, of the present invention in the form of a module As shown in FIG. 6, the hinge structure is coupled to the main body frame F and the unit door D by bolt coupling structures, thereby forming a hinge structure that does not require an external hinge type welding operation.

On the other hand, the present invention has been described with reference to the embodiment shown in the drawings, but this is only an example, those skilled in the art will understand that various modifications and equivalent embodiments are possible from this. The true technical protection scope of the present invention should be defined by the appended claims.

As described above, according to the hinge structure of the door of the motor control center unit according to the present invention, by adopting the outer hinge structure coupled to the outside of the door to strengthen the durability, to prevent the damage to the hinge neck of the conventional unit, It is effective to prevent the deflection caused by the weight of the door after the door is installed.This prevents the deflection caused by the weight of the door after assembly. It has a prevented effect.

In addition, by changing the assembly method to the bolt fastening method, there is an effect of eliminating any problems such as damage to the parts due to welding, shortening the processing time and improving the assembly.

In other words, by reflecting the technology, such as cost reduction / productivity improvement / convenience provided by the present invention in the design structure, it has the effect of contributing to the improvement of sales by securing sales competitiveness and increasing product competitiveness with other companies.

Claims (3)

The hinge structure used to open and close the unit door of the motor control center (MCC), A main hinge whose one end is fixed to the main frame; And a door hinge fixed to an outside of the unit door and rotatably coupled to the other end of the main body hinge by a hinge pin. The method of claim 1, And the door hinge is coupled to the unit door by bolts. The method of claim 2, The hinge structure of the motor control center unit door, characterized in that the 'c' type hinge support is coupled between the door hinge and the bolt.

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