JPH0139172B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a hacker device for a switchgear operating mechanism.

FIG. 1 shows an example of a conventional hacker device of this type. In the figure, 1 is a closing spring as a driving source, 2 is an operating rod, 3 is a lever, 4 is a link, 5 is a shaft, 6 is a stopper, 7 is a lever, 8 is a hook, 9 is a hook point, 10 is a roller, 11 is a locking pin, 12 is a plunger, 13 is an electromagnetic coil for closing, 14 is a link, 15 is a switchgear main body,
16 is a pin, and 17 is a connecting pin.

Such a hacker device has a structure in which the spring force F ₁ is reduced by the length of the moment arm l ₁ to _{l 4} of each component, so that the hacker device can finally be broken with a small force. In this case, the force _F2 finally applied to the locking pin 11 is as follows.

F ₂ =F ₁ ×L ₂ /L ₁ ×l ₁ ×l ₃ /l ₂ ×l ₄ (1) L ₁ and L ₂ are the dimensions of the illustrated portion of the lever 3.
F ₂ <<F ₁ , and the plunger 12 can be operated with a small force.

To perform the circuit closing operation, the plunger 12 is moved downward by the excitation of the electromagnetic coil 13 for circuit closing, and the locking pin 11 is rotated clockwise, thereby collapsing the locking device and releasing the spring force. , the switchgear main body 15 enters a closed circuit state. That is,
When the locking pin 11 is removed from the locking point 9, the lever 8 rotates clockwise, the lever 7 rotates counterclockwise, and the lever 3 is allowed to rotate clockwise via the link 4. Thereupon, the spring 1 is released and extended upward in the drawing, and the operating rod 2 is also moved upward in conjunction with this, and the opening/closing device main body 15 is brought into a closed state. In order to operate from this state to the open state, a drive device using compressed fluid is used in this example. In the figure, 60 is a drive piston, 61 is a cylinder, 62 is an inlet, 63 is a control valve, 64 and 65 are upper and lower openings of the inflow passage, 66 is an inflow pipe, and 67 and 68 are upper and lower parts of the discharge passage. 69 is a storage tank for compressed fluid; 70 is a compressed fluid generation source such as a compressor; 71 is a return spring;
72 is a plunger, and 73 is an electromagnetic coil for opening the circuit. In the figure, the coil 73 is energized and the plunger 7
2 indicates a state biased to the left. In this state, the compressed fluid is sent from the storage tank 69, through the inflow pipe 66, the openings 65 and 64, and into the cylinder 61 from the inflow port 62, pushing the drive piston 60 upward.
The lever 3 is rotated counterclockwise via the connecting pin 17, and the operating rod 2 is pulled down to open the switch main body 15. The spring 1 is compressed again to prepare for the next closing operation, and the link 4, lever 7, hook 8, and locking pin 11 return to the illustrated state. The control valve 63 is activated by the return spring 7 as the electromagnetic coil 73 for opening the circuit is demagnetized.
1, the upper opening 67 moves to the right at the inlet 62.
is in the corresponding position, and the compressed fluid in the cylinder 61 is discharged to the atmosphere through the lower opening 68. The fluid in reservoir 69 is maintained within reservoir 69 because valve 63 closes inlet pipe 66 .

However, in such a hacker device,
Many of the links and levers have relatively large operating strokes or momentum, and therefore the response time required for operation is long. In addition, since the structure is such that the dimensional ratio of each member engaging with each other is directly proportional to the reduction of the acting force, the finished dimensional accuracy during the manufacturing of the members is extremely important. There is a drawback that there is a large possibility of causing variations in the results. Furthermore, in a structure in which the pivot support points of each element are all fixed points, vibrations during the operation of each member are directly transmitted to the pivot points of the hammer, etc. Another drawback is that a repulsive force is generated due to the weight of the lever, etc. that comes into contact with it, and as a result, there is a possibility of malfunction.

The purpose of the present invention is to prevent the dimensional accuracy of the members and elements from subtly affecting the acting force, to reduce the number of members and reduce the manufacturing cost, and to reduce the momentum of each element. To provide a hacker device with a stable opening/closing device operating mechanism that has a quick response time and is free from the risk of malfunction due to vibration during operation.

Hereinafter, specific examples of the present invention will be described in detail with reference to the drawings. FIG. 2 shows an embodiment of the hacker device according to the present invention in an open state. A compression type closing spring 18 as an accumulating type closing driving source is connected to the opening/closing device main body 15 via a lever 22 and a rod 19 as an interlocking member. Rod 1
Reference numeral 9 denotes a lever 2 whose movement direction is regulated by a roller 20 and which rotates around a pin 21.
2 to the movable part of the switching device main body 15, and operates in unison with the switching device main body 15. The engaging portion 2 of the rod 19 is used to stop the release of the driving force accumulated by the closing spring 18.
3 is engaged with an engaging portion 26 of a main hacker 25 that is rotatable around a pin 24. Therefore, the accumulated force of the circuit closing spring 18 is transmitted to the main hooker 25, and the main hooker 25 is urged to rotate clockwise in the drawing. A movable roller 27 is rotatably supported at the lower end of the main hacker 25. Also, the main hammer 25 has a return spring 29.
is biased counterclockwise. In this case, the spring force of the springs 18 and 29 is set to be much larger for the spring 18. The main hacker 25 is prevented from rotating clockwise in the closed circuit state by a sub-hacker 30 of a rectilinear movement type. The sub-hacker 30 is sandwiched between a movable roller 27 supported by the main hooker 25 and a fixed roller 32 supported via a shaft 31 on the fixed side.
It is designed to be able to move up and down, almost parallel to the The surface of the sub-hacker 30 in contact with the movable roller 27 has an overhanging surface 30A and a retreating surface 3.
0B are provided in stages in the moving direction, and the movable roller 27 is in contact with the projecting surface 30A in the open state. The moving direction of the sub-hacker 30 is regulated by a guide 33 so that it moves only in the vertical direction perpendicular to the line connecting both rollers 32 and 27, and the overhanging surface 30A contacts the movable roller 27 when the circuit is opened. When the circuit is closed, the movable roller 27 rises and approaches the retreating surface 30B. Also, when the circuit is closed, the subhatsuka 30
A spring 34 is provided for returning the holder from the raised position to the lowered position.

In order to raise the sub-hacker 30 when the circuit is closed, a plunger 40 is provided on the lower side along the moving direction of the sub-hacker 30. This plunger 40 is driven by the excitation of an electromagnetic coil 41 for closing the circuit.

As described above, in the open state shown in FIG. 2, the accumulated force of the closing spring 18 is transmitted to the rod 19. The rod 19 is engaged with the main hooker 25 at engaging portions 23 and 26, and is held in an open state. At this time, the force F ₁ of the opening spring 18 is acting on the rod ₁₉ as shown in _FIG . There is. In such a state, the subcarrier 30
A spring 34 holds the projecting surface 30A in contact with the movable roller 27. Therefore, the main hacker 25 is prevented from rotating clockwise by the projecting surface 30A of the sub-hacker 30.

When closing the circuit, when the electromagnetic coil 41 for circuit opening is excited, the plunger 40 moves upward in the drawing, thereby pushing up the sub-hacker 30 against the return spring 34, and the projecting surface 30A comes off the movable roller 27. , the main hooker 25 rotates clockwise and comes off the rod 19, and the rod 19 immediately descends due to the accumulated pressure of the closing spring 18, and conversely, the movable part of the switchgear main body 15 rises as shown in FIG. The switch main body 15 enters a closed circuit state.

At this time, the force F ₆ for pushing up the sub-hacker 30 is F ₆ =μF ₃ +F ₂ =μ×(F ₁ ×d ₁ /d ₂ −F ₄ )+F ₂ (2) where μ is the roller The friction coefficient of the contact surface between 27 and 32 and the sub-assembly car 30, F ₁ is the closing spring 18
F2 is the accumulated force acting on the rod 19, _F2 is the force acting on the sub-hacker 30 due to the return spring 34,
F ₃ is from main car 24 to sub car 30
F ₄ is the force acting on the main hacker 24 by the return spring 29, F ₅ is the force acting on the return spring 49
This is the force that acts on the plunger 40 due to the force. By using the rollers 27 and 32 to create rolling friction, μ can be reduced to a very small value such as 0.002 to 0.004. Therefore, F ₆ can be reduced to several hundred times compared to F ₁ , and it is also more effective than the conventional structure that uses a moment arm near the dead center of the lever to reduce the force. Since the invention does not utilize dead points at all, it is very efficient and can perform accurate operations without extremely increasing the dimensional accuracy of each element.

In this embodiment, the rod 19 and the main hacker 2 are
5 is a pawl engagement, which allows the operating stroke of the main chipper 25 to be smaller compared to the case where it engages with a roller, and because the amount of movement required is correspondingly small, the entire chipper device is Since the response time can be shortened, this method is suitable when high-speed operation is required.

FIG. 4 shows another embodiment of the chipper device for the sheath cutter operating machine according to the present invention. In this embodiment, a rotating shaft 50 is provided, a cam 51 as an interlocking member is integrally attached to the rotating shaft 50, and the engaging portion 52 of the cam 51 is engaged with the engaging portion 26 of the main hooker 25. In addition, the rotating shaft 50 and the free end side of the circuit closing spring 18 as a circuit closing drive source are connected to an arm 53.
It is connected by . Similar effects can also be obtained in this manner.

In the above embodiment, the present invention is applied to a chipper device for a closed coil, but the present invention can be similarly applied to a chipper device for an open circuit coil.

Further, in the above embodiments, an example in which a spring is used as the pressure accumulation type closed circuit driving source has been described, but a fluid operating cylinder or the like may be used instead of the spring.

As explained above, in the hacker device of the opening/closing device operating mechanism according to the present invention, the main hacker is directly controlled by the sub-hacker that moves in a straight line, so links and levers that require a large amount of momentum can be omitted, and the response time can be shortened. can do. especially,
When the interlocking member is locked with the main hook, the accumulated pressure of the drive source is acting, so as soon as a command is issued, the accumulated force of the drive source is released and drives the switchgear main body. As a result, a switchgear with high-speed response can be realized. Furthermore, when a linearly movable sub-hacker is used in combination with the main hacker, the precision of the parts does not directly affect the transmission ratio of the acting force, so variations in operating performance can be reduced. Furthermore, if a linearly movable sub-hacker is used in combination with the main hacker, there is no need for malfunctions even if there is vibration during operation. In addition, since large links and levers are not used, there are advantages such as the overall compactness.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view showing the structure of a conventional hacker device, FIG. 2 is a cross-sectional view showing an embodiment of the hacker device according to the present invention in its engagement position, and FIG. 3 is the hacker device shown in FIG. 2. FIG. 4 is a sectional view showing another embodiment of the hacker device according to the present invention. 15... Switching device main body, 18... Closing spring (accumulation type drive source), 19, 51... Interlocking member, 23,
26... Engaging portion, 25... Main hooker, 27
...Movable side roller, 30...Subhatsuka, 32
... Fixed side roller, 40 ... Plunger, 41
...An electromagnetic coil for closing.

Claims (1)

[Scope of Claims] 1. An interlocking member that is mechanically connected to a movable part of a switchgear main body and is configured to transmit the force of an accumulating drive source of the switchgear main body, and the interlocking member. A chipper device for a switchgear operating mechanism, comprising a main chipper and a main chipper that stops releasing the accumulated driving force of the drive source, the movable roller being rotatably supported by the main chipper; , a fixed side roller rotatably supported on the fixed side and in contact with the below-mentioned sub-hacker and sandwiching the below-mentioned sub-hacker together with the movable side roller; and an overhanging surface and a retreating surface are provided in steps in the moving direction. a state in which the movable side roller contacts the overhanging surface and prevents the main hacker from rotating in a direction away from the interlocking member, and a state in which the movable side roller moves from this state upon a command and is brought into contact with the retreating surface. A hacker device for an opening/closing device operation mechanism, characterized in that a sub-hacker of a linearly movable type is in a state in which the main hooker contacts with the main hooker and allows the main hooker to rotate in a direction away from the interlocking member.