KR200415996Y1 - Apparatus for automatically discharging closing spring of circuit breaker - Google Patents

Abstract

The present invention relates to an automatic spring release device of the breaker, the automatic spring release device of the breaker according to the present invention, a cam member fixed to the cradle; An off unit rotatably mounted to the frame and interlocked with the cam member to rotate the off lever when the frame is taken out; And an on unit movably installed in the frame and interlocked with the off unit to rotate the on lever. Even when an input signal is applied when the breaker is drawn out, the movable terminal and the fixed terminal are not connected. Do not.

Closing spring, automatic release, on lever, off lever

Description

Spring automatic release device of breaker {APPARATUS FOR AUTOMATICALLY DISCHARGING CLOSING SPRING OF CIRCUIT BREAKER}

1A and 1B are views for explaining a withdrawal operation of a conventional circuit breaker;

Figure 2 is a partially exploded perspective view schematically showing the interior of the breaker according to an embodiment of the present invention,

3 is a perspective view of main parts of FIG. 2;

4 is a plan view of FIG.

5a to 5c is a view for explaining the operation of the injection spring automatic release device according to an embodiment of the present invention,

6A to 6C are views for explaining the operation of the driving link unit according to the state of each of FIGS. 5A to 5C.

<Description of Symbols for Main Parts of Drawings>

100; Frame 106; Fixed terminal

108; Movable terminal 110; On lever

112; Off lever 120; Drive link unit

140; Automatic release device 142; Cam member

142a, 142b; First and second cam portions 150; Off unit

151; Support plate 152; Cam Follower

154; Sliding lever 155; Lever base

156; Off lever contact 160; On unit

162,164; First and second connecting links 166; On lever contact member

200; Closing spring

The present invention relates to a breaker (Circuit Breaker), and more particularly to a draw-out breaker that can be pulled out on the cradle (Cradle), in particular in the withdrawal of the breaker so that the breaker does not enter even if the input signal is applied in the drawn state The present invention relates to an automatic release spring release device of a circuit breaker which automatically releases the closing spring.

In general, the breaker is for selectively opening and closing the electric path between the power supply side and the load side, and the fixed breaker fixed between the power supply side and the load side terminal and the drawable pull-out type on the cradle fixed to the power supply side and the load side terminal It is classified as a breaker.

Fixed breakers require disconnection of the fixed terminals on the power and load side for maintenance, which requires considerable time and effort. In order to make up for the shortcomings of such fixed circuit breakers, a draw-out circuit breaker that can be withdrawn from the cradle and maintained by a simple operation has been recently used.

1A and 1B, when the trip button (not shown) is pressed to withdraw the drawout breaker from the cradle (not shown), the drawout handle inserting groove is opened so that the drawout handle can be inserted, and at the same time, the movable terminal (1) and the fixed terminal 2 are separated and are in a trip state.

Looking at the process of separating the movable terminal (1) and the fixed terminal (2) according to the operation of the trip button in more detail, as shown in Figure 1a when the operator presses the trip button in the input state, the off lever 3 is rotated The trip link 4 is unlocked in conjunction with the rotation of the off lever 3. When the trip link 4 is unlocked, it is rotated in the A direction by the first spring 5, and the locking of the two joint link 6 is released by the rotation in the A direction of the trip link 4. When the locking of the two-joint link 6 is released, the two-joint link 6 is folded by the restoring force of the compressed contact spring 7, whereby the fixed terminal 2 and the movable terminal 1 are separated. .

Further, when the trip button is pressed, a driving motor (not shown) is driven to rotate the cam 8, and the charge link 9 rotates in the B direction by the rotation of the cam 8, as shown in FIG. 1B. Likewise, the input spring 10 is compressed.

As shown in FIG. 1B, when the breaker is pulled out, the fixed terminal 2 and the movable terminal 1 are separated, but the closing spring 10 is in a compressed state. Therefore, when the input button is pressed, the fixed terminal 2 and the movable terminal 1 come into contact again while the input spring 10 is extended.

The injection spring 10 has a large elastic modulus in order to contact the movable terminal 1 and the fixed terminal 2 in the shortest possible time. Therefore, when the input spring 10 is extended, a surprisingly loud impact sound is generated by the operator, whereby the operator drops or breaks the breaker to the ground.

The present invention has been made in view of the above-described point, to provide an automatic spring release device of the breaker for automatically releasing the closing spring so as not to be inserted even when the closing signal is applied when the breaker is pulled out.

Automatic release spring breaker of the breaker according to the present invention for achieving the above object is fixed with a fixed terminal on the frame which is installed to be pulled out and inserted from the cradle, and a movable terminal selectively contacting the fixed terminal, An on lever and an off lever rotatably mounted on a frame, and a drive that stretches and retracts an input spring in conjunction with rotation of the on lever and selectively separates the movable terminal from the fixed terminal in conjunction with rotation of the off lever. An automatic spring release device of a breaker including a link unit, comprising: a cam member fixed to the cradle; An off unit rotatably installed on the frame and interlocked with the cam member to rotate the off lever when the frame is taken out; And an on unit movably mounted to the frame and interlocked with the off unit to rotate the on lever.

According to an embodiment of the present invention, the cam member, the first cam portion for rotating the off unit in one direction (D direction) and the second cam portion for rotating the off unit in the other direction (L direction) To be prepared.

The on unit is linked to one direction (D direction) rotation of the off unit to rotate the on lever in one direction (H direction) to extend the compressed injection spring, and the off unit is in the other direction (L direction). In this case, the off lever is rotated in one direction (M direction) to separate the movable terminal and the fixed terminal.

The off unit includes a support plate fixed to the frame; A sliding lever rotatably installed on the support plate; A cam follower rotatably installed on one side of the sliding lever, the cam follower rotating the sliding lever in one direction and the other direction while being linked to each of the first and second cam portions, respectively; And a lever base rotatably installed on the frame such that the lever lever rotates coaxially with the sliding lever, and an off lever contact portion for selectively rotating the off lever.

The on unit includes: a first connection link one end of which is rotatably connected to the lever base; A second connection link rotatably installed on the frame and one end of which is rotatably connected to the other end of the first connection link; And an on lever contact member connected to the other end of the second connecting link so as to be selectively rotated in association with the rotation of the second connecting link and movable in the frame.

Hereinafter, with reference to the accompanying drawings will be described in detail with respect to the breaker and the automatic spring release device of the breaker according to an embodiment of the present invention.

2 and 6A, a breaker according to an embodiment of the present invention includes a frame 100 that can be drawn out and inserted into a cradle (not shown), and a fixed terminal 106 provided on one side of the frame 100. ), A movable terminal 108 selectively contacting the fixed terminal 106, an on lever 110 and an off lever 112 rotatably installed on the frame 100, and the frame 100. It is provided in the interior of the on lever 110 in conjunction with the rotation of the injection spring (200) to extend the contact terminal 108 and the fixed terminal 106, and in conjunction with the rotation of the off lever 112 And a driving link unit 120 for selectively separating the movable terminal 108 from the fixed terminal 106 and an injection spring for automatically releasing the injection spring 200 according to the withdrawal of the frame 100. The release device 140 is included.

The frame 100 includes a main frame 102 that forms an outer skeleton and a support frame 104 that is fixed to the main frame 102 and supports the above-described various components therein. The support frame 104 is composed of a plurality of the drive link unit 120 is supported so as to be movable therebetween.

The fixed terminal 106 is fixed to the main body frame 102, one end is connected to the power supply side terminal not shown, the other end is connected to the movable terminal 108.

The movable terminal 108 is rotatably installed in the frame 100, and is selectively separated and contacted with the fixed terminal 106 as it rotates on the frame 100.

The on lever 110 is rotatably installed on the support frame 104 and rotates on the support frame 104 to interlock the drive link unit 120 to fix the movable terminal 108 to the support frame 104. The terminal 106 is brought into contact.

The off lever 112 is rotatably installed on the support frame 104 and rotates on the support frame 104 to interlock the drive link unit 120 to connect the movable terminal 108 to the fixed terminal. (106).

The drive link unit 120 includes an input link 121, a cam 122, a charge link 123, a trip link 124, a two joint link 125, a contact link 127, and a contact spring 128. It includes.

The input link 121 is rotatably installed on the support frame 104 to be linked to the rotation of the on lever 110.

The cam 122 is driven by a driving motor (not shown) and one end of the charge link 123 is in contact with the cam 122.

The charge link 123 is rotatably installed on the support frame 104, and one end of the input spring 200 is connected to the other end thereof. Accordingly, when the cam 122 rotates, the charge link 123 rotates in conjunction with the cam 122, and when the charge link 123 rotates, the injection spring 200 connected to the other end of the charge link 123 is stretched. do.

One end of the trip link 124 is supported by the spring 124a and the other end is rotatably installed on the support frame 104, and is selectively released by interlocking with the rotation of the off lever 112. In addition, the trip link 124 selectively unlocks the articulated link 125 so that the articulated link 125 can be folded by the restoring force of the contact spring 128 or can be linearly moved on the support frame 104. do.

The two-joint link 125 is a form in which two links are rotatably connected by the central joint portion 126, and one end of the two-joint link 125 is rotatably installed and linearly movable. A stage is rotatably installed at the contact link 127.

The contact link 127 connects the movable terminal 108 and the two joint link 125.

One end of the contact spring 128 is installed in the frame 100, and the other end thereof is connected to the movable terminal 108. Accordingly, when the movable terminal 108 and the fixed terminal 106 are in contact, the contact spring 128 is in a compressed state, and the movable terminal 108 is restored by the restoring force of the compressed contact spring 128. ) Is rotated and separated from the fixed terminal 106.

Since the structure and connection relationship of each component of the drive link unit 120 are already known techniques, detailed descriptions thereof will be omitted. In addition, the connection relationship and the interlocking structure of the drive link unit 120 and the on lever 110 and the off lever 112 is also known, and thus, detailed description thereof will be omitted.

2 to 4, the closing spring automatic release device 140 includes a cam member 142, an off unit 150, and an on unit 160.

The cam member 142 is fixed to a cradle (not shown), and first and second cam portions 142a and 142b are formed on a surface facing the off unit 150 of the cam member 142.

The off unit 150 includes a support plate 151, a cam follower 152, a sliding lever 154, and a lever base 155.

The support plate 151 is fixed to the frame 100 and is installed to support the respective members.

The cam follower 152 is rotatably installed on the sliding lever 154, and a torsion spring 153 is interposed between the cam follower 152 and the sliding lever 154. One end of the torsion spring 153 is supported by the first protrusion 154a of the sliding lever 154, and the other end passes through the cam follower 152 to allow the first and second cam portions of the cam member 142 to pass through. Extends to 142a and 142b. That is, the other end of the torsion spring 153 is in contact with the first and second cam portions 142a and 142b such that the cam follower 152 is moved along the first and second cam portions 142a and 142b. Guide.

The sliding lever 154 is rotatably installed on the support plate 151 and includes a first protrusion 154a and a second protrusion 154b. As described above, one end of the torsion spring 153 is supported, and the cam follower 152 contacts the first protrusion 154a when the cam follower 152 rotates in one direction. In addition, when the cam follower 152 rotates in the other direction, the sliding lever 154 rotates together in the other direction by the elastic force of the torsion spring 153. The second protrusion 154b is provided with a rotation shaft of the cam follower 152, and the torsion spring 153 is inserted into the rotation shaft.

The lever base 155 is rotatably installed at both ends of the support frame 104 and the support plate 151 to have the same rotation axis as the sliding lever 154. One side of the lever base 155 is provided with an off lever contact portion 156 that selectively contacts the off lever 112 when rotated.

The on unit 160 includes first and second connection links 162 and 164 and an on lever contact member 166.

One end of the first connection link 162 is rotatably installed on the sliding lever 154, and the other end is rotatably connected to the second connection link 164 so that the lever base 155 rotates. Rotating the second connection link 164 while moving up and down.

The second connection link 164, one end is connected to the first connection link 162, the other end is connected to the off lever 112, the center portion is rotatably installed on the support frame 104. .

The on lever contact member 166 is movably installed on the support frame 104 and rotates the on lever 110 while moving up and down in association with the rotation of the second connection link 164.

Hereinafter will be described in detail with respect to the automatic spring release device of the breaker according to the present invention.

When the operator presses the trip button 111 to withdraw the breaker, the withdrawal handle insertion groove is opened, and the off lever 112 is rotated by the trip button 111. When the off lever 112 rotates, the trip link 124 is unlocked and the trip link 124 is rotated by the spring 124a to release the locking of the articulated link 125. When the articulated link 6 is unlocked, the articulated link 125 is folded by the restoring force of the compressed contact spring 128, whereby the fixed terminal 106 and the movable terminal 108 are separated. . In addition, when the trip button 111 is pressed, a driving motor (not shown) is driven to rotate the cam 122, and the charge link 123 is rotated by the rotation of the cam 122 to compress the injection spring 10. This leads to a state as shown in FIG. 6A.

As shown in FIGS. 5A and 6A, when the breaker is pulled out of the cradle, the cam follower 152 moves along the first cam portion 142a (see FIG. 2) of the cam member 142 (see FIG. 2) and slides. Rotate in the D direction on the lever 154. The sliding lever 154 and the lever base 155 also rotate in the D direction by the rotation of the cam follower 152. As the lever base 155 rotates in the D direction, the first connection link 162 moves downward (E direction), and the second connection link 164 is linked to the movement by the first connection link 162. Rotates in the F direction. When the first connection link 162 rotates in the F direction, the lever contact member 166 linked thereto rotates the on lever 110 in the H direction while moving in the G direction.

When the on lever 110 rotates in the H direction, a driving motor (not shown) is driven to rotate the cam 122 in the I direction, and the charge link 123 is inserted into the spring as the cam 122 rotates in the I direction. It is rotated in the J direction by the restoring force of (200). The charge link 123 that rotates in the J direction pushes the center joint portion 126 of the two joint link 125 upwards to fold the two joint links 125. As the two-joint link 125 is extended, the movable terminal 108 and the fixed terminal 106 are connected by pushing the contact link 127 in the K direction, thereby becoming a state as illustrated in FIG. 6B.

Referring to FIG. 5B, the breaker is further drawn out from the cradle (not shown), and the cam follower 152 is moved along the second cam portion 142b (see FIG. 2) of the cam member 142 (see FIG. 2) to L. FIG. Direction, and as the cam follower 152 rotates in the L direction, the sliding lever 154 and the lever base 155 also rotate in the L direction, and by the L direction rotation of the lever base 155, the off lever The contact portion 156 (see FIG. 3) rotates the off lever 112 in the M direction to reach the state of FIG. 5C.

Referring to FIG. 6B, when the off lever 112 rotates in the M direction, the locked state of the trip link 124 is released in response to the off lever 112 and rotates in the N direction by the spring 124a. As the trip link 124 rotates in the N direction, the articulated link 125 is released and folded while moving in the O direction by the contact spring 128. In conjunction with the movement of the two-joint link 125, the contact link 127 is moved in the O direction and the movable terminal 108 and the fixed terminal 106 are separated. In the state where the breaker is completely drawn out by such an operation, the state shown in FIG. 6C is obtained.

As described above, according to the present invention, since the closing spring is extended in the state in which the breaker is pulled out, the movable terminal and the fixed terminal are not connected even when the closing signal is applied. Accordingly, even if the operator inadvertently applies the input signal, the breaker is not input, thereby preventing the operator from being surprised or malfunctioning the breaker.

The present invention is not limited to the above-described specific preferred embodiments, and any person having ordinary skill in the art to which the present invention pertains may make various modifications without departing from the gist of the present invention claimed in the claims. Of course, such changes are intended to fall within the scope of the claims set forth.

Claims (5)

A fixed terminal fixed on the frame releasably inserted from the cradle, a movable terminal selectively contacting the fixed terminal, an on lever and an off lever rotatably mounted on the frame, and a rotation of the on lever. In the automatic release device of the spring breaker of the breaker comprising a drive link unit interlocked with the expansion spring and coupled to the rotation of the off lever to selectively separate the movable terminal from the fixed terminal, A cam member fixed to the cradle; An off unit rotatably installed on the frame and interlocked with the cam member to rotate the off lever when the frame is taken out; And And an on unit movable in the frame and interlocked with the off unit to rotate the on lever. The method of claim 1, wherein the cam member, And a first cam portion for rotating the off unit in one direction (D direction) and a second cam portion for rotating the off unit in another direction (L direction). The method of claim 2, The on unit is linked to the rotation of one direction (D direction) of the off unit to rotate the on lever in one direction (H direction) to extend the compressed injection spring, When the off unit is rotated in the other direction (L direction) by rotating the off lever in one direction (M direction), the closing spring automatic release device of the breaker, characterized in that for separating the movable terminal and the fixed terminal. The method of claim 3, wherein the off unit, A support plate fixed to the frame; A sliding lever rotatably installed on the support plate; A cam follower rotatably installed on one side of the sliding lever, the cam follower rotating the sliding lever in one direction and the other direction while being linked to each of the first and second cam parts, respectively; And And a lever base rotatably installed on the frame so as to co-rotate with the sliding lever and provided with an off-lever contact portion for selectively rotating the off lever. The method of claim 4, wherein the on unit, A first connection link one end of which is rotatably connected to the lever base; A second connection link rotatably installed on the frame and one end of which is rotatably connected to the other end of the first connection link; And And an on lever contact member connected to the other end of the second connecting link so as to be selectively rotated in conjunction with the rotation of the second connecting link and movable in the frame. Spring automatic release device of circuit breaker.

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