JPS6262010B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a switch operation mechanism for opening and closing a switch such as a vacuum switch.

First, in order to facilitate understanding of the present invention, a description will be given of FIG. 1, which shows an example of the configuration of an opening/closing part of a switch that is opened and closed by the switch operating mechanism according to the present invention. In FIG. 1, 1 is a vacuum switch tube, and its fixed electrode and movable electrode are each connected to an external lead. 2 is a movable stud, 3 is an insulation mold, 4 is a wipe spring,
Reference numeral 5 denotes a lever, which has various functions such as adjustment of mounting dimensions by a movable stud 2, electrical insulation by an insulating mold 3, contact pressure by a wipe spring 4, and converting rotational movement into linear movement by a lever 5. The movement in the rotational direction at 6 moves the movable electrode to open and close the vacuum switch tube 1. The main shaft 6 is rotatably supported in the housing 10 by a main shaft pin 0610. Further, the main shaft 6 is provided with a crank 7 and a crank pin 12 at its tip, and this crank pin 12 is connected to a crank window 1 provided in the housing 10.
1, and by moving the crank pin 12, the main shaft 6 is rotated through the roller 7 to open and close the vacuum switch pipe 1. In addition, crank window 1
012 has the required width to allow the crank pin 12 to make the movement necessary to open and close the vacuum switch pipe 1. Since the switch is configured as described above, the switch can be opened and closed by driving the crank pin 12 in the required direction for the required stroke.
When opening and closing a switch, arcs are generally generated at the contacts when closing and closing the switch, so the opening and closing operations of the switch control must be performed at a constant speed, regardless of whether the operator is closing or closing the switch. be. In addition, in an emergency, there is a need for a trip function that allows disconnection to be performed at a constant speed regardless of manual operation. The crank pin 12 is driven by converting the force into a closing/disengaging operation force at a constant speed, and is also driven via an operation mechanism that can perform a trip operation if necessary.

The present invention relates to the structure of an operating mechanism that satisfies the above-mentioned requirements, and provides a circuit breaker operating mechanism that has a simple structure, quick closing and shutting, and a trip function.

Embodiments of the present invention will be described below with reference to the drawings. Figures 2, 3, and 4 are diagrams showing an embodiment of the present invention, and the opening/closing operations are as follows: Figure 2 shows the closing state, Figure 3 shows the shut-off state, and Figure 4 shows the transition from shut-off to closing. It shows the state of the process. In FIG. 2, reference numeral 11 denotes an operating rod, one end of which is rotatably connected to the crank pin 12. Reference numeral 13 is a shutoff spring that is hung on a connecting pin A1121 of the operating rod and urged upward in the drawing. 21 is a latch arm, one end of which connects the operating rod 11 and the connecting pin A11.
It is rotatably connected to 21. 22 is a fan-shaped latch, one end of which is fixed to the housing 10, and a rotating shaft A.
1022, and is rotatably connected to the latch arm 21 by a connecting pin B2122. 23 is an L-shaped latch for housing 1
A roller A22 is rotatably attached to a rotating shaft B1023 fixed at 0 and provided on an L-shaped latch 23.
23 can be slidably engaged with the shoulder portion 2201 of the fan-shaped lever 22. 24 is a rotating shaft C102 which is fixed to the housing 10 with a tri-platz.
4, and its notch 2401 is slidably engaged with a roller B2324 provided on the L-shaped latch. Reference numeral 25 denotes a trip lever, which is rotatably attached to the rotating shaft C1024 and is movably engaged with the trip latch 24 to rotate the trip lever 25 counterclockwise when the trip lever 25 rotates counterclockwise. The trigger plate 24 is also moving counterclockwise. 26 is a latch spring that biases the L-shaped latch 23 clockwise, 27 is a spring that biases the latch 24 clockwise, and 31 is a closing arm, one end of which is rotatable with a connecting pin C1131. connected. Reference numeral 32 denotes a loading link, one end of which is rotatably connected to the loading arm 31 by a connecting pin D3132. Reference numeral 33 denotes a closing lever, one end of which is rotatably connected to the closing link 32 by a connecting pin E3233, and the other end to which an external operating force is applied. It is coupled to the handle shaft 34. The connecting pin E3233 is pushed at its end and is arranged so that it engages with and closes the trip bar 25 when the input lever 33 rotates about the handle shaft 34. 41 is a joint link rotatably connected to the operating rod 11 by the connecting pin C1131. Reference numeral 42 is a closing crank, which is rotatably attached to a rotating shaft D1042 fixed to the housing 10, and is rotatably connected to the joint link 41 by a connecting pin F4142. 43 is a spring joint, one end of which is rotatably connected to the closing crank 42 by a connecting pin G4243, and a closing spring 44 is applied to the other end. In addition, the other end of the closing spring 44 is hung on a spring hook 45 provided on the housing 10.
It is biased in the direction of 5. 46 is stoppa,
By applying a portion 4201 of the closing crank to this, upward movement of the operating rod 11 in the drawing is restricted. In FIGS. 3 and 4, the same reference numerals as in FIG. 2 indicate equivalent products.

Next, the operation will be explained. In the closing state shown in FIG. 2, the force of the opening spring 13 that urges the operating rod 11 upward is caused by the line connecting the connecting pin A1121 and the connecting pin B2122, which is the point of application of the force of the opening spring 13, on the fan-shaped lever 22. Since the rotation axis 1022 of
1 and the roller A2223 of the L-shaped latch 23, and furthermore, the roller B2324 of the L-shaped latch 23 and the notch 2401 of the trip latch 24 are engaged, thereby being locked in the state shown in FIG. 2 and ready for opening. The urging force of the opening spring 13 is maintained. Closing is maintained by the force of a closing spring 44.
The force of the closing spring 44 is transmitted between the line connecting the rotating shaft D1042 of the closing crank 42 and the connecting pin G4243, the closing spring hook 45, and the connecting pin G4243 so that the maximum force is transmitted to rotate the closing crank 42 counterclockwise. Connect the stopper 46 so that the angle formed by the line of action of the closing spring force is around 90°.
is provided. Connecting pin G at the tip of the operating rod 11
1131 and connecting pin F4142 of the closing crank corresponds to the point of action of the biasing force of the closing spring. Since it is located closer to the rotating shaft D1042 than the connecting pin G4243, a large closing holding force can be applied to the crank pin 12 with a weak spring force. Next, the tripping operation in this state will be explained. When the trigger latch 24 is turned counterclockwise, the roller B2324 slides through the notch 2401 of the trigger latch 24 due to the biasing force of the opening spring 13, and is then disengaged from the engaged state, and the L-shaped latch rotates counterclockwise. Then, the pressure on the shoulder 2201 of the fan-shaped lever 22 by the roller A2223 is released, and the fan-shaped lever 22 rotates clockwise. moves due to the urging force of the third
It becomes a figure. Next, the shutoff operation by driving the handle shaft 34 will be explained. When the handle shaft 34 is turned clockwise, the tip of the connecting pin D3233 engages with the trip lever 25, and the trip lever 25 is rotated counterclockwise. The trip latch 24 rotates counterclockwise and performs the same operation as the trip operation described above, finally reaching the shut-off state shown in FIG. 3. As explained above, the trip operation is configured to release the latch state by unlatching the notch 2401 of the trip latch 24 and the roller 2324, so that the crank pin 12 is moved from the closed position to the closed position. The transfer speed is a constant value determined by the biasing force of the cutoff spring 14 regardless of the movement of the trigger spring 24. Next, handle shaft 3
When the handle shaft 34 is turned counterclockwise in the cut-off state shown in FIG.
2 through the closing arm 31 and the connecting pin 1131, the force is transmitted to the operating rod 11, and is pushed down in the drawing with the crank pin 12 as a fulcrum, causing the joint link 41 to rotate the closing crank 42 clockwise. As a result, a closing spring 44 connected to the closing crank 42 via a spring joint 43 is biased. At the same time, the latch arm 21 is also pushed down, the fan-shaped latch 22 rotates counterclockwise, and the roller A2223 of the L-shaped latch, which is biased clockwise by the spring 26, slides on the arcuate rail portion 2202 of the fan-shaped latch. Engages shoulder 2201 of the sector latch. On the other hand, since the trigger latch 24 is lightly biased clockwise by the latch spring 26, the fan-shaped latch shoulder 22
01, the roller B2324 engages with the notch 240 of the trip latch 24.
1. In the process of biasing the opening spring 14 and closing spring 44, the spring catch 45
Until the rotating shaft E1042 and the connecting pin G4243 are aligned, the biasing force of the closing spring 44 acts as a force to rotate the closing crank 42 counterclockwise and pulls up the operating rod 11 in the drawing. The biasing force of the closing spring 44 acts as a force to rotate the closing crank 42 clockwise, and acts to push down the operating rod 11. Through the above process, the state shown in FIG. 4 is reached. At this point, the contact pin 3201 of the closing link 32 hits the cross trigger 51, and the position of the connecting pin D3233 moves from the left side to the right side in the drawing from the line connecting the connecting pin C1131 and the connecting pin E3132.At this point, the opening spring 13 The fan-shaped latch shoulder 2201 that has descended too far is
2223, the operating rod 11 is pulled up about the crank pin 12, and after the latch shoulder 2201 and roller A 2223 are engaged, the operating rod 11 is pulled up. The fulcrum is from the crank pin 12 to the connecting pin A1121.
At the same time, the crank pin 12 is pushed down by the self-closing force of the vacuum switch tube 1 shown in FIG. 1, and the operating rod 11 attempts to rotate counterclockwise about the connecting pin 1211 as a fulcrum. On the other hand, the force of the closing spring 44 is applied to the spring hook 45 and the rotating shaft 104 as described above.
Connecting pin 4243 on the left side on the extension line of the line connecting 2.
In this state, the operating rod 11 attempts to rotate clockwise about the connecting pin 1121, resisting the force of the self-closing force of the vacuum switch tube 1 that causes the operating rod 11 to rotate counterclockwise, and the closing speed decreases. has a suppressive effect. When the connecting pin 4243 moves to the right side on the extension line, the biasing force of the closing spring 44 acts to rotate the operating rod 11 counterclockwise about the connecting pin 1121, thereby closing the vacuum switch pipe 1. Then, by further energizing the wipe spring 4, a part 4201 of the closing crank 42 hits the stopper 46, stopping the movement and maintaining that state, resulting in the closing state shown in FIG. 2. At this time, connecting pin C1131 and connecting pin F41
42 is closer to the rotating shaft 1042 of the closing crank than the connecting pin G4243, which is the point of application of the force of the closing spring 44, the closing spring 44 biases the wipe spring 4 with a relatively weak biasing force. and can be held. Furthermore, since the operating lever is connected to the closing crank 42 that moves in an arc, the speed of the operating lever 11 is moderated when the vacuum switch tube 1 is closed.

Although the above-mentioned embodiment has been described with respect to a manually operated vacuum circuit breaker, the present invention can be applied to other power operated vacuum circuit breakers and circuit breakers other than vacuum.

As described above, by providing the closing crank in the operating mechanism of the switch according to the present invention, effects such as being able to achieve a predetermined closing speed and closing holding force can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the opening/closing part of a vacuum circuit breaker, and FIGS. 2 to 4 are block diagrams showing the structure of an embodiment of the present invention. In the figure, 12 is a crank pin, 13 is an opening spring, 21 is a latch arm, 22 is a fan-shaped lever,
23 is an L-shaped latch, 24 is a tri-latch, 25
is a trip lever, 26 is a latch spring, 27 is a spring, 31 is a closing arm, 32 is a closing link, 33
is the closing lever, 34 is the handle shaft, 41 is the joint link, 42 is the closing crank, 43 is the spring joint, 44 is the closing spring, 45 is the spring hook, 46 is the stopper, 51 is the cross trigger,
1022 is the rotation axis A, 1023 is the rotation axis C, 10
24 is the rotation axis D, 1042 is the rotation axis E, 1121
is connecting pin A, 2122 is connecting pin B, 1131
is connecting pin C, 3233 is connecting pin D, 3132
is connecting pin E, 4142 is connecting pin F, 4243
2223 is a connecting pin G, 2223 is a roller A, and 2324 is a roller B. Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims (1)

[Claims] 1. A crank pin connected to the movable contact of the switch and supported in a predetermined position when the switch is in the open state, an operating rod with one end attached to the crank pin, and a control rod rotatably supported on the main body of the switch. a second link rotatably connecting the other end of the operating rod and the first link; a third link having one end rotatably connected to the first link; , one end is rotatably connected to the other end of the third link, the other end is attached to the main body of the switch, and the operating rod is moved in the first direction with the crank pin supported at the predetermined position as a fulcrum. a biasing spring, the crank pin mounting portion of the operating rod and the second
A locking mechanism that is connected to the link connecting portion and locks the spring in a loaded state; and a link mechanism that is connected to the other end of the operating rod, which includes a charging arm, a charging link, and a charging lever. When the handle shaft and the operating rod reach the predetermined position, they engage with a part of the closing link, and the operating rod is connected to the locking mechanism by the biasing force of the stored spring. a locking stopper that allows the operating rod to be rotated in the first direction, that is, the closing direction using the locking mechanism as a fulcrum; a lock release portion that allows the operating rod to be rotated in the blocking direction using the connecting portion with the link mechanism as a fulcrum by the biasing force of the spring;
and the shortest distance between the line of action of the biasing force generated at the connection point of the first link and the second link and the center of the rotation axis of the first link is a position at which the spring starts to release. and the line of action of the force generated at the connection point between the first link and the third link and the first
The first link, the second link, and the third link are located at positions where the shortest distance between the links and the center of the rotation axis becomes longer as the spring moves from the release start position to the release end position. 1 link and the 3rd link above
An operating mechanism for a switch, characterized in that a connection point for each link is provided.