KR101636818B1 - swichgear having earthquake proof function using loose prevention nut - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for preventing a nut from loosening in an earthquake-proof function.
In the present invention, the nut to which the bolt is fastened is formed with a female thread in a certain section from the inlet side in the section through which the male thread of the bolt penetrates, and a chamber having a relatively larger inner diameter than the female thread diameter in the section where the female thread is not formed And an elastic member having one end fixed and elastically deformable while being installed in the chamber is formed to have an inner diameter relatively smaller than the outer diameter of the bolt so that the bolt fastened to the nut is fixed by pressing to prevent the nut from being loosened A nut fastening preventing device for a switchgear, comprising: a moving member that is movable on an inner circumferential surface of the chamber and supports a supporting end of the elastic member; and the moving member is moved so as to release the pressing state of the elastic member And moving means for allowing the member to be moved on the inner circumferential surface of the chamber. Accordingly, when the position of the structure fixed by the bolt and the nut is set incorrectly or when it is necessary to disassemble the structure in order to perform the maintenance, the binding force of the elastic member can be released by rotating the set screw, The consumption of parts can be prevented.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an earthquake-

The present invention relates to a power transmission and transmission system having an earthquake-resistant function, and more particularly, to a power transmission system having an earthquake-resistant power transmission system in which a coil spring mounted on an inner circumferential surface of a nut is fastened to a bolt, The present invention relates to a seismic-free power transformer and an earthquake-resistant power transformer, and more particularly, to an earthquake-resistant power transformer and an earthquake-resistant power transformer, which are capable of maintaining a state in which a nut is not loosened by applying a restraining force and releasing a forced restraint force.

Generally, switchboards such as distribution panel, MCC panel, low pressure panel, high pressure panel, transformer panel and special high pressure panel are installed in electric room such as building, factory or apartment building to receive high voltage or extra high voltage electricity supplied from electric power company, There is a switchboard to distribute the load to the customer.

Such a switchboard includes various electric devices and equipments, for example, a transformer, an optimum operation controller of the transformer, a power monitoring controller, and the like, and is designed to block the inflow of moisture and foreign substances from the outside, Structure. In particular, the power monitoring controller installed inside the high and low pressure integrated switchboard processes the sensed values of the temperature sensor and the current voltage sensor to extract information such as the operating temperature, load factor, phase loss factor, power factor, harmonic factor, and imbalance ratio of the high voltage transformer It is also notified to the administrator through the LCD display attached to the power monitoring controller and also transmitted to the remote management system through the communication device which is interfaced to the controller.

Since the enclosure of the switchboard is installed on the ground or on the concrete slab of the building, when an earthquake occurs, the shock wave is transmitted to the switchboard as it is and damage to the electric equipment installed inside the switchboard prevents stable power supply to the place where electric power is needed. Electric shocks may occur.

Therefore, the transmission / distribution panel can be provided with a vibration preventing means, for example, a compression spring or a vibration proof rubber plate between the bottom surface of the enclosure and the concrete bottom surface to mitigate shock and vibration in the vertical and horizontal directions, It is possible to prevent a short circuit, a power failure and a fire from occurring due to damage to the electric equipment.

In addition, the electrical equipment inside the switchboard and the installation structures of these electrical equipment shall be installed so as to have a seismic function in order to prevent damage such as power outage or fire, by preventing earthquake or vibration, do.

One example of a device that is capable of preventing loosening of the nut is proposed in KR 10-0701643 B1 (Registered on Mar. 23, 2007) and KR 10-0701782 B1 (Registered Mar. 24, 2007).

In the nut tightening prevention device, a coil spring is provided in the non-threaded portion provided inside the nut, one end of the coil spring is supported by the nut, and the other end is fastened to the nut in a state of being elastically deformed freely. So that the bolt and the coil spring are engaged with each other to prevent the nut from being loosened.

As the nut tightening prevention device having such a structure is applied, the urging elastic force of the coil spring acts on the bolt fastened to the nut while rotating, so that a resistance is generated against the torque that the bolt is fastened to the nut, which makes it difficult to tighten the bolt .

Further, since the bolt fixed by the coil spring prevents the nut from loosening in a state where the coil spring is elastically adhered to the valley portion of the thread by elasticity, when the bolt and nut are to be loosened, the coil spring tightens the bolt The bolt can be unscrewed by rotating it with a force stronger than the pressure. Therefore, there is an inconvenience that it is difficult to position the structure fixed by bolts and nuts in the wrong position, or to work to release the bolt when maintenance is required.

Another example of a nut tightening preventing device exhibiting an earthquake-proof resistance in a seismic switchboard having a seismic function is proposed in KR 10-1214105 B1 (Registered Dec. 13, 2012).

In the apparatus, a coil spring is provided in a non-threaded portion provided inside a loosening preventing nut which is applied to various fastening parts for earthquake-proof, and a pin serving as a stopper is inserted into the nut, When the operator manually removes the pin from the nut after the bolt is fastened, the inner diameter of the coil spring is reduced and returned to the original state, so that the screw is tightly attached to the threaded portion of the bolt fastened to the nut, .

Such an apparatus is advantageous in that the coil spring is elastically pressed against the male screw of the bolt in a similar manner as when the pin is removed after the bolt is fastened to the nut, thereby facilitating the operation of fastening the bolt at an early stage.

However, when the pin comes out from the nut, it can not be inserted again, and there is no way to release the fixing force of the spring which fastens the bolt.

Therefore, if the position of the structure fixed by bolts and nuts is wrong, or it needs to be repaired, the bolts and nuts can not be released. Therefore, it is necessary to disassemble the nuts and disassemble the bolts, Should be separated.

This phenomenon not only makes maintenance, replacement and reinstallation work extremely difficult, but also causes an economic loss which causes waste of components.

KR 10-0701643 B1 (Registered on Mar. 23, 2007) KR 10-0701782 B1 (Registered on Mar. 24, 2007) KR 10-1214105 B1 (Registered December 13, 2012)

The present invention has an earthquake-resistant function that can force the nut to stay in a locked state without being loosened by applying a constraining force in a state where the bolt is fastened to the nut, and the position of the structure fixed by the bolt and the nut is wrongly set, When it is necessary to disassemble the structure for maintenance, it is possible to unfasten the bolts and nuts which are kept in a forced state by the earthquake-proof function, so that the initial installation of the structures for installing the internal electric devices in the switchgear It is an object of the present invention to provide a seismic resistant switchgear using an unlocking nut having an earthquake-resistant function that can easily perform maintenance work and prevent unnecessary parts from consuming.

In order to accomplish the object of the present invention, a nut for fastening a bolt is formed with a female thread in a certain section from the inlet side in a section through which the male thread is passed, while in a section where the female thread is not formed, The inner diameter of the elastic member, which is installed in the chamber and is fixed at one end thereof so as to be elastically deformable, is formed relatively smaller than the outer diameter of the bolt, The nut member is provided with a movable member which is movable on the inner circumferential surface of the chamber and which supports the support end of the elastic member, The moving member is moved to the inner peripheral surface of the chamber so as to release the pressurized and pressurized state Standing to moving means to be able to be moved.

The moving means is characterized in that the tip end of a set screw fastened to the nut body from the outside of the nut makes sliding contact with the moving member to move the moving member.

Preferably, the contact surface with which the moving member contacts the set screw has an inclined surface formed on at least one of the contact surfaces of the moving member and the set screw so as to be in a smooth sliding contact, more preferably, Is formed.

The sliding member is formed in a sliding groove formed in an inner circumferential surface of the chamber to provide sliding contact with the sliding member. The protruding portion protruding from the sliding member toward the space of the chamber supports the supporting end of the elastic member.

The moving member that is movable in the sliding groove of the chamber is formed such that the length of the sliding portion in the vertical direction is relatively higher than the pitch interval of the elastic member so that the sliding member is not separated from the groove of the inner circumferential surface of the chamber by the elastic member.

According to the present invention as described above, the elastic member is housed in the chamber while the moving member is inserted into the sliding groove formed in the inner circumferential surface of the chamber, one of the contact ends of the elastic member is fixed to the nut, In the direction of the spiral line. As the set screw that is fastened to the nut body comes into contact with the moving member, the inner diameter of the elastic member is expanded or contracted according to the degree to which the set screw is inserted into the nut.

As a result, when the set screw is rotated so as to be inserted deeply into the nut, the moving member is moved to the side pushing the contact end of the elastic member, so that the inner diameter of the coil spring gradually expands, and the bolt and nut can be fastened easily. When the set screw is rotated to the direction of coming out of the nut, the moving member, which receives the elasticity of the elastic member, moves in the opposite direction to gradually decrease the inner diameter of the elastic member, and the elastic member is forcibly brought into pressure contact with the bolt fastened to the nut The binding force prevents the loosening of the nut.

When the bolt needs to be released again, when the set screw is rotated so that the movable member pushes the elastic member, the inner diameter of the set screw is again expanded, and the force of forcible binding is released so that the bolt and the nut can be easily disassembled .

According to the present invention, it is possible to prevent loosening of a nut fastened by a bolt due to a forcing force of an elastic member, and it is possible to easily disengage the forcible fastening force as the bolt and nut are fastened, It is possible to easily carry out a work for releasing the bolt when the position of the structure fixed by the nut is wrong or it needs to be repaired.

In addition, it is possible to disassemble the necessary parts without disassembling the bolt and nut combination or disassembling the whole structure in order to disassemble the bolt, so that it is possible to provide an economical effect that can prevent the waste of the parts, have.

BRIEF DESCRIPTION OF THE DRAWINGS FIG.
2 is an exploded perspective view of the present invention
Fig. 3 is a perspective view showing the internal engagement state of the present invention
4A is a plan view of the elastic member of the present invention in a state in which the bolt is not constrained;
Fig. 4B is a front sectional view of the elastic member of the present invention in a state in which the bolt is not constrained
5A is a plan view of the elastic member of the present invention in a state where the bolts are restrained;
5B is a front sectional view of the elastic member of the present invention in a state where the bolt is restrained;

The features and advantages of the present invention will become more apparent from the following detailed description of the present invention when taken in conjunction with the accompanying drawings.

Before describing the embodiments of the present invention in detail, the present invention is not limited to the details of construction and arrangement of the components described in the following detailed description or illustrated in the drawings. The invention may be embodied and carried out in other embodiments and carried out in various ways. Also, the expressions and predicates used herein in connection with terms such as device or element orientation, etc., are used merely to simplify the description of the present invention and do not indicate or imply that the associated device or element should have a particular orientation.

In addition, terms and words used in the present specification and claims should not be construed to be limited to ordinary or dictionary meanings, and the inventor should appropriately define the concept of a term in order to describe its own invention in the best way. The present invention should be construed as meaning and concept consistent with the technical idea of the present invention.

It should be noted that the embodiments described in the present specification and the configurations shown in the drawings are only the most preferred embodiments of the present invention and do not represent all the technical ideas of the present invention, It should be understood that there may be many equivalents and variations.

Therefore, it is intended that the present invention covers the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents. It will be understood that various modifications and changes may be made in the present invention.

Hereinafter, embodiments of the present invention will be described.

FIG. 1 is a perspective view of the present invention, FIG. 2 is an exploded perspective view of the present invention, and FIG. 3 is a perspective view showing an internal coupling state of the present invention.

As shown in this figure, the nut preventing device of the present invention is composed of a nut 1, a movable member 2, an elastic member 3, and a set screw 4.

The nut 1 is formed in a hexagonal shape like a general shape and has an inlet 10 through which the bolt 5 flows in the direction in which the bolt 5 is fastened and an outlet 11 through which the bolt 5 is exposed do.

A female thread 12 and a chamber 13 are continuously formed in a continuous space passing through between the inlet 10 and the outlet 11.

The female screw 12 is formed to a predetermined section from the inlet 10 side into which the male thread 50 of the bolt 5 flows, preferably to a substantially middle portion of the height of the nut 1.

The chamber 13 has a relatively larger diameter than the bore diameter of the female thread 12 and forms a space continuous with the outlet 11 at the intermediate portion of the nut 1 where the female thread 12 is completed, .

The outlet 11 refers to a space in which the male thread 50 of the bolt 5 is exposed and paradoxically becomes an inlet through which the movable member 2 and the elastic member 3 are inserted into the chamber 13.

A flange 14 is formed on the inner circumferential surface of the outlet 11 to form an inner diameter relatively smaller than the inner diameter of the chamber 13 so that the elastic member 3 suspended in the chamber 13 is not released to the outside, The fixing groove 16 is formed from the upper surface 15 to fix the elastic member 3 to be inserted into the fixing groove 13.

The inner circumferential surface of the chamber 13 has a relatively larger diameter than the outer diameter of the elastic member 3 so that the inner surface of the elastic member 3 is pressed against the male thread 50 of the bolt 5 fastened to the nut 1 And a sliding groove 17 in which the moving member 2 is inserted is formed on the inner circumferential surface of the inner circumferential surface.

The sliding groove 17 is a space for sliding movement so that the movable member 2 can compress and relax the elastic member 3 and preferably forms a curved surface 18 concentric with the inner peripheral surface of the chamber 13 . The movable member 2 sliding in the sliding groove 17 is able to press the elastic member 3 in the spiral direction of the elastic member 3 while moving in the circumferential direction concentric with the elastic member 3 .

A screw groove (19) for fastening the set screw (4) is formed from one side of the hexagonal body.

The screw groove 19 is for fastening the set screw 4 outside the nut 1. The set screw 19 is formed at a position passing through one side of the sliding groove 17 from one side of the hexagonal body, 4 can be brought into contact with the moving member 2 placed in the sliding groove 17.

The shifting member 2 is formed of the sliding portion 20, the protruding portion 21, and the inclined surface 22.

The sliding portion 20 is formed so that the length in the vertical direction is relatively higher than the pitch interval of the elastic member so that the sliding portion 20 is seated in the sliding groove 17 in the chamber 13 and then the inner side surface 23 is successively inserted into the chamber 13, And the moving member 2 is prevented from being detached from the sliding groove 17. In this case, The outer side surface 24 is formed in the same curved surface as the sliding groove 17 and can move in the circumferential direction in the sliding groove 17.

The projecting portion 21 is formed integrally with the sliding portion 20 and has the same height as the cross section of the elastic member 3 and protrudes toward the inside of the chamber 13 to support the elastic member 3.

The inclined surface 22 is a portion where the moving member 2 is in contact with the set screw 4, so that the contact resistance with the set screw 4 can be minimized.

The elastic member 3 is formed in the same shape as the coil spring and has a fixed end portion 30 formed at one end of the upper portion to be bent outwardly in a circumferential direction, The fixed end portion 30 is inserted and fixed in the fixing groove 16 formed in the movable member 15 and the lower supporting end portion 31 is in contact with the projecting portion 21 of the movable member 2. [

The elastic member 3 made of the coil spring is installed so that the fixed end portion 30 is fixed to the nut 1 and the coiled portion can elastically deform in the chamber 13. [

The elastic member 3 is elastically deformed in the spiral direction of the elastic member 3 which is a coil spring in accordance with the moving direction of the moving member 2 so as to press the bolt 5 fastened to the nut 1, The pressurized pressing force can be released.

The set screw 4 has a conical inclined surface 40 formed at its tip end.

The set screw 4 is formed on one side of the projecting portion 22 of the moving member 2 which is fastened to the screw groove 19 formed in the nut 1 and the inclined surface 40 is previously seated in the slide groove 17 It is possible to move the movable member 2 in contact with the inclined surface 22.

First, the moving member 2 is seated in the sliding groove 17 formed on the inner circumferential surface of the chamber 17 through the chamber 17 of the nut 1. In this case,

The elastic member 3 is inserted into the chamber 13 to fix the fixed end portion 30 formed on the upper portion of the elastic member 3 to the fixing groove 16 provided on the upper surface 15 of the nut 1 And the lower supporting end portion 31 is brought into contact with the inner surface of the projection 21 of the moving member 2 which is seated in the sliding groove 17 in advance. Then, the set screw (4) is fastened to the screw groove (19) of the nut (1).

The set screw 4 is rotated and fastened to the nut 1 until the inclined surface 40 of the set screw 4 comes into contact with the inclined surface 22 of the moving member 2. Then,

At this time, while the sliding member 20 is in the state of being close to the outer diameter of the elastic member 93 in a state where the movable member 2 is slidable in the sliding groove 17, the protruding portion 21 formed with the inclined surface 220 And is set so as not to be detached toward the chamber (13) by making contact with the set screw (4).

A state in which the nut 1 fastened to the bolt 5 is prevented from being loosened will now be described according to the nut tightening prevention device of the present invention having the above-described structure.

FIG. 4A is a plan sectional view of the elastic member of the present invention in a state in which the bolt is not constrained, and FIG. 4B is a front sectional view of the elastic member of the present invention in a state in which the bolt is not constrained.

The set screw 4 initially fastened to the screw groove 19 of the nut 1 or the set screw 4 in the state where the nut 1 is not fastened to the bolt 5 And is screwed into the screw groove 19 to a deep position.

At this time, the set screw 4, which is fastened to the deep position of the screw groove 19 in a state where the inclined surface 22 of the movable member 2 and the inclined surface 40 of the shear screw 4 are in contact with each other, The movable member 2 is moved in the circumferential direction in the sliding groove 17 while moving in the linear direction toward the axial center.

The moving member 2 moving in the circumferential direction by the set screw 4 presses the supporting end 31 of the elastic member 3 in the spiral direction so that the pressing force of the moving member 2 The elastic member 3 to be received is elastically deformed and the inner diameter of the coil is expanded.

The coil inner diameter I of the elastic member 3 is larger than the outer diameter E of the male screw 50 of the bolt 5 and the outer diameter of the male screw 50 of the bolt 5 and the coil inner diameter I of the elastic member 3 E so that the male thread 50 of the bolt 5 fastened to the nut 1 is not affected by the elastic member 3.

Next, a state in which the bolt 5 fastened to the nut 1 is restrained by the elastic member 3 will be described.

 FIG. 5A is a plan sectional view of the elastic member of the present invention in a state where the bolts are constrained, and FIG. 5B is a front sectional view of the elastic member of the present invention in which the bolts are constrained.

The set screw 4 is fastened to the deep position of the screw groove 19 so that the elastic member 3 is elastically deformed so as not to interfere with the male screw 50 of the bolt 5 as described above, The coil inner diameter I of the elastic member 3 and the outer diameter 50 of the bolt 5 of the elastic member 3 become larger than the outer diameter E of the male screw 50 of the bolt 5, The space S in the circumferential direction is formed between the outer diameter E and the bolt 5 in a state in which the male thread 50 of the bolt 5 fastened to the nut 1 is not interfered with the elastic member 3. [ The nut 1 is fastened to the male thread 50 of the male screw 50.

At this time, as described above, the elastic member elastically deformed in the state where elasticity is accumulated does not interfere with the male screw 50, so that the nut 1 can be smoothly fastened to the intended position.

When the fastening of the bolt 5 and the nut 1 is completed, the direction in which the set screw 4 comes out of the screw groove 19 in order to fix the fastened position and restrain the nut 1 and the bolt 5 .

Then, the set screw 4 is linearly moved to a position away from the axis center of the nut 1. At the same time, the movable member 2, to which the resiliently deformed elastic member 3 acts, And gradually moves in the circumferential direction in the opposite direction in the sliding groove 17 while maintaining contact with the inclined surface 40 of the screw 4.

When the pressing force of the elastic member 3 is released, the elastic member 3, which has been elastically deformed due to the elasticity of the elastic member 3, is returned to reduce the coil inner diameter I of the elastic member 3, 50) outer diameter (E).

The coil inner diameter I of the elastic member 3 is smaller than the outer diameter E of the male thread 50 of the bolt 5 and the fixed end portion 30 of the elastic member 3 is connected to the nut 1 So that the nut 1 is held in a restrained state so that it can no longer be rotated by the male screw 50 of the bolt 5 and thus the loosening of the nut 1 is prevented.

If the nut 1 is to be unscrewed from the male thread 50 of the bolt 5 in the following manner, that is, the position of the structure fixed by the bolt 5 and the nut 1 is set incorrectly, The set screw 4 is rotated and moved to the inside of the screw groove 19 so that the movable member 3 presses the elastic member 3 again to cause elastic deformation It becomes possible to separate the nut 1 from the state described with reference to Figs. 4A and 4B.

That is, the set screw 4 is fastened to the depth of the screw groove 19 so that the coil inner diameter I of the elastic member 3 expanding becomes larger than the outer diameter E of the male screw 50 of the bolt 5, A space S in the circumferential direction is formed between the coil inner diameter I of the member 3 and the outer diameter E of the male screw 50 of the bolt 5 and the male screw 5 of the bolt 5 fastened to the nut 1 The nut 1 can be freely rotated and the nut 1 can be detached from the male thread 50 of the bolt 5 when the elastic member 3 is not interfered with.

According to the embodiment as described above, the bolts and nuts having the earthquake-proof function and maintained in the forcibly fastened state can be released, so that the initial installation and maintenance work of the structures for installing the internal electric devices in the switchboard So that it is possible to easily perform the operation, and unnecessary parts can be prevented from being consumed.

The present invention has been described with reference to preferred embodiments thereof.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. Therefore, the disclosed embodiments should be considered in an illustrative rather than a restrictive sense.

1: nut 2: moving member
3: elastic member 4: set screw
10: entrance 11: exit
12: Cancer out 13: Chamber
14: flange 15: upper surface
16: fixing groove 17: sliding groove
18: surface 19: screw groove
20: sliding portion 21:
22: slope 23: inner side
24: Outer side 30: Fixed end
31: support end portion 40: inclined surface

Claims (5)

A nut having a relatively larger inner diameter than a bore diameter of the female screw is formed in a section where the female screw is not formed, while a female screw is formed in a certain section from the inlet side in a section where the bolt is screwed, And an elastic member having an end fixed to the chamber and being elastically deformable, the inner diameter of the elastic member being relatively smaller than the outer diameter of the bolt so that the bolt fastened to the nut is pressed and fixed to prevent the nut from being loosened. In the release preventing device,
A movable member for supporting the support end of the elastic member while being movable on the inner circumferential surface of the chamber is provided and the movable member can be moved on the inner peripheral surface of the chamber so that the movable member can press the elastic member and release the pressed state Said means for moving said means
Wherein the sliding member is formed in a sliding groove formed in an inner circumferential surface of the chamber so as to make sliding contact therewith, and a protruding portion protruding from the sliding portion toward the space of the chamber supports the supporting end of the elastic member Seismic Function Switchgear with Loosening Nut.
2. The anti-seizing function according to claim 1, wherein the moving means is capable of moving the moving member by sliding the tip end portion of the set screw fastened to the nut body from the outside of the nut to the moving member. Switchboards.
2. The anti-seizure function distribution system according to claim 1, wherein the contact surfaces of the moving member and the set screw contact with each other are formed with inclined surfaces on either one of the contact surfaces or with sloped surfaces formed on both contact surfaces, .
delete The sliding member according to claim 1, wherein the moving member inserted in the sliding groove formed in the inner circumferential surface of the chamber is formed so that the length of the sliding member in the vertical direction is relatively higher than the pitch interval of the elastic member, Is prevented from being detached from the groove of the anti-disengagement nut.

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