JP2014035982A - Switching device, and mechanism for operating the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a switching device and a switching device operating mechanism requiring no greasing, and improving economical efficiency and operation characteristics by reducing influence of deterioration with the passage of time, infrequent operations, and low temperature environments.SOLUTION: Molybdenum disulfide particles are sprayed at a high speed flow to a sliding surface part 8a of a spring receiver holding part 8 in an open circuit guide part 201, a sliding surface 12b of a spring receiver holding part 12 in a closed circuit spring guide part 202, an engagement surface part 41b of a latch 41 in an open circuit trigger part 301, an engagement surface part 13c of a closed circuit lever 13 in a closed circuit trigger part 302, and an engagement surface part 50b of a locking lever 50 for the closed circuit to form a molybdenum disulfide film layer. The molybdenum disulfide is a solid lubricant which is fused by heat and enters the deep part of a base material to be recrystallized.

Description

  Embodiments described herein relate generally to an opening / closing device operating mechanism using a spring operating force and an opening / closing device including the same.

  In general, an opening / closing device that opens and closes an electric circuit is provided with an opening / closing device operating mechanism that shifts the opening / closing device between an open circuit state and a closed circuit state. The switching device operating mechanism performs an open circuit operation or a closed circuit operation by reciprocating the movable contact, and interrupts a high voltage current such as an accident current in a short time by the open circuit operation. Therefore, the switchgear operating mechanism needs to drive the movable contact at high speed. Therefore, a hydraulic operation mechanism has been proposed as an opening / closing device operation mechanism. The hydraulic operating mechanism is characterized in that a large operating force can be obtained using hydraulic energy.

  However, in recent years, the switchgear including gas circuit breakers has been miniaturized, and a high voltage current can be cut off with a small operating force. As a result, a spring operation mechanism that can obtain a medium / low output is frequently applied to the switchgear operation mechanism (for example, Patent Document 1). The spring operation mechanism includes an open circuit spring that performs an open circuit operation and a close spring that performs a close circuit operation. By releasing these springs from the stored state, the spring energy is transmitted to the movable contact, and the movable contact High speed drive is realized.

  Such a spring operation mechanism has a link mechanism part between a spring and a movable contact in order to transmit spring energy to a movable contact. In the spring operation mechanism, a spring trigger part and a spring guide part are indispensable for each spring. A spring trigger part is a part which hold | maintains a spring in an energized state, performs the releasing, and releases a spring. The spring guide portion is a portion that allows the spring to smoothly perform an accumulating operation and a releasing operation by holding the spring slidably.

JP 2006-32189 A

  The following problems are pointed out in the conventional spring operation mechanism. That is, the spring guide portion and the spring trigger portion have a portion where the members slide and a portion where the members engage with each other. These sliding portions and engaging portions change with time due to friction between members. Therefore, lubricating oil is filled in the sliding portion and the like for the purpose of suppressing the change with time.

  However, periodic lubrication of the lubricating oil is essential, and the cost of maintenance is a problem. Further, infrequently operating parts with low operating frequency are likely to malfunction due to deterioration or exhaustion of the lubricating oil. Furthermore, when the outside air temperature decreases, the lubricating oil may increase in viscosity and solidify. Therefore, when the switchgear is used in a low temperature environment, the operation characteristics of the operation mechanism may be degraded.

  The switchgear and the switchgear operating mechanism according to the present embodiment have been proposed to solve the above-described problems. An object of the present embodiment is to provide a switchgear and a switchgear operating mechanism that do not require lubricating oil and that are less affected by changes over time, infrequent operation, and low-temperature environments, and that are economical and improve operating characteristics. There is.

In order to achieve the above object, the switchgear operating mechanism of the present embodiment is a switchgear operating mechanism that reciprocally drives the movable contact of the switchgear to move the movable contact between the open state and the closed state. And it is characterized by having the following (1)-(3).
(1) An open spring that shifts the movable contact from a closed state to an open state by releasing.
(2) A closed spring that shifts the movable contact from the open state to the closed state by releasing.
(3) A solid lubricant layer formed at a portion where members included in the switchgear operating mechanism are in contact with each other and having a molybdenum disulfide film layer.

The expansion | deployment front view of 1st Embodiment (The open circuit state of a movable contact). The expansion | deployment front view of 1st Embodiment (closed state of a movable contact). A front view of an open circuit spring guide part of a 1st embodiment (open circuit spring energized state). The front view of the open circuit spring guide part of 1st Embodiment (open circuit spring energy storage state). The front view of the closing spring guide part of 1st Embodiment (closing spring releasing state). The front view of the closing spring guide part of a 1st embodiment (closing spring energized state). The front view of the open spring trigger part of 1st Embodiment (closed state of a movable contact). The front view of the closing spring trigger part of a 1st embodiment (opening state of a movable contact which is the time of accumulating completion of a closing spring). The front view of the open circuit spring trigger part of 1st Embodiment (The open circuit operation middle state of an open circuit spring). The front view of the open circuit spring trigger part of 1st Embodiment (state following the state of FIG. 9).

[First Embodiment]
The first embodiment will be described with reference to FIGS.
(Overall configuration of switchgear and switchgear operating mechanism)
The overall configuration of the switchgear and the switchgear operating mechanism will be described with reference to the developed front views of FIGS. 1 and 2. As shown in FIGS. 1 and 2, the switchgear includes a movable contact 100 and a switchgear operating mechanism that reciprocally drives the movable contact 100 to move the movable contact 100 between an open state and a closed state. And are provided. FIG. 1 shows the open state of the movable contact 100, and FIG. 2 shows the closed state of the movable contact 100.

  The opening / closing device operating mechanism according to the first embodiment is a spring operating mechanism using a spring operating force. The switch operating mechanism is provided with a frame 20 that is a support structure of the mechanism adjacent to the movable contact 100. An attachment surface 20a is provided on the upper portion of the frame 20, and an open spring guide portion 201 and a closed spring guide portion 202 are disposed adjacent to each other on the attachment surface 20a.

  The open spring 4 is slidably held by the open spring guide 201, and the closed spring 10 is slidably held by the closed spring guide 202. The open circuit spring 4 and the closed circuit spring 10 are composed of compression coil springs. Inside the frame 20 are a link mechanism portion 101 for transmitting the spring operating force of the open spring 4 or the close spring 10 to the movable contact 100, an open trigger portion 301 for releasing the open spring 4, and an open spring spring 10 releasing force. A closing trigger unit 302 is arranged.

(Link mechanism)
The link mechanism unit 101 will be described with reference to FIGS. In the link mechanism 101, the link lever 1 is disposed substantially horizontally inside the frame 20. The link lever 1 has a left end connected to the movable contact 100. When the link lever 1 moves to the right, the movable contact 100 is opened (FIG. 1), and when the link lever 1 moves to the left, the movable contact 100 is closed (FIG. 2). ing.

  The upper end portion of the main lever 2 is rotatably engaged with the right end portion of the link lever 1. A rotation shaft is installed near the center of the main lever 2, and this rotation shaft is rotatably mounted inside the frame 20. In the main lever 2, a pin 2a is fitted on the left side of the rotation shaft, and a pin 2b is fitted on the lower side of the rotation shaft. In addition, the axis | shaft of the pin provided in 1st Embodiment including the pins 2a and 2b is arrange | positioned in parallel mutually.

  A lower end portion of the open circuit spring link 7 is rotatably attached to the pin 2a of the main lever 2. The open spring link 7 is disposed vertically from the inside to the top of the frame 20. The open circuit spring link 7 passes through the mounting surface 20 a at the upper part of the frame 20, and its upper end is fixed to the damper 6. The damper 6 is a member included in the open circuit spring guide part 201. The open circuit spring link 7 connects the main lever 2 and the open circuit spring 4 held by the open circuit spring guide part 201 via the damper 6.

  The right end portion of the main / sub connecting link 9 is rotatably attached to the pin 2b of the main lever 2. A sub lever 31 is rotatably attached to the left end of the main / sub connecting link 9 via a pin 31a. That is, the main / sub connecting link 9 is a link that connects the main lever 2 and the sub lever 31.

  A sub shaft 30 (shown by a two-dot chain line in FIGS. 1 and 2) is attached to the rotation shaft portion of the sub lever 31. The sub shaft 30 is disposed horizontally, and a cam lever 33 and a latch lever 32 are fixed to each other. The latch lever 32 is a member included in the opening trigger unit 301. A roller 33 a is rotatably fitted to the right end portion of the cam lever 33.

  A closed shaft 3 (shown by a two-dot chain line in FIGS. 1 and 2) is attached to the rotating shaft portion of the main lever 2. Reference numeral 3 a is the center of the closed shaft 3. The closed shaft 3 is arranged in parallel with the sub shaft 30. The closed shaft 3 and the sub shaft 30 are rotatably supported by bearings (not shown) fixed to the frame 20.

  A closing cam 15 and a closing lever 13 are fixed to the closing shaft 3. The closing cam 15 is arranged so that a roller 33 a provided on the cam lever 33 on the subshaft 30 side comes into contact with and is separated from the outer peripheral portion as the closing shaft 3 rotates. The locking lever 40 is a member included in the opening trigger portion 301, and the closing lever 13 is a member included in the closing trigger portion 302. A pin 13a is provided at the lower end of the closing lever 13, and a closing spring link 14 is rotatably attached to the pin 13a.

  The closed spring link 14 is disposed vertically from the inside to the top of the frame 20. The closing spring link 14 passes through the mounting surface 20a at the top of the frame 20, and its upper end is attached to the pin 11a of the closing spring receiver 11 on the closing spring guide 202 side. The closing spring link 14 connects the main lever 2 and the closing spring 10 held by the closing spring guide portion 202 via the closing lever 13 and the closing shaft 3.

(Open circuit spring and open circuit spring guide)
The open circuit spring 4 and the open circuit spring guide part 201 will be described with reference to FIGS. The open circuit spring 4 is a spring that performs an open circuit operation by releasing. The open spring 4 has a lower end fixed to a mounting surface 20 a at the top of the frame 20. In the open state of the movable contact 100 shown in FIG. 1, the open spring 4 is in a released state, and in the closed state of the movable contact 100 shown in FIG. 2, the open spring 4 is in an accumulated state.

  The open-circuit spring guide part 201 is a part that holds the open-circuit spring 4 so as to be slidable and restricts the release and accumulation of the open-circuit spring 4. The open circuit spring guide part 201 includes an open circuit spring receiver 5, a damper 6, a spring receiver holding part 8, and a stopper 18. Among these, the open circuit spring receiver 5 is fitted to the upper end of the open circuit spring 4. A plurality of guide holes 5 a are provided on the peripheral edge of the open spring receiver 5. A damper 6 is fixed to the lower surface portion of the open spring receiver 5. As described above, the open circuit spring link 7 is fixed to the lower end portion of the damper 6. A fluid is sealed inside the damper 6, and a piston 6 a is disposed on the upper part so as to be slidable in translation.

  The spring receiver holding portion 8 is fixed to the mounting surface 20a of the upper part of the frame 20 so as to sandwich the open spring receiver 5. The spring receiver holding part 8 is inserted into the guide hole 5a of the open spring receiver 5, whereby the open spring holder 5 is slidably held by the spring receiver holding part 8. A sliding surface portion 8 a (illustrated by hatching) is provided at a sliding portion between the open-circuit spring receiver 5 and the spring receiver holding portion 8. Molybdenum disulfide particles are sprayed on the sliding surface portion 8a with a high-speed air stream to form a molybdenum disulfide coating layer.

  The stopper 18 is fixed to the upper end portion of the spring receiver holding portion 8. The opening spring receiver 5 moves upward in the spring receiver holding portion 8 and the piston 6a hits the stopper 18, thereby restricting the release of the opening spring 4 (state shown in FIGS. 1 and 3). The accumulation of the open spring 4 is restricted by the downward movement of the open spring receiver 5 in the spring receiver holding portion 8 so that the open spring receiver 5 hits the lower end of the guide hole 5a (the state shown in FIGS. 2 and 4). ).

(Closed spring and closed spring guide)
The closing spring 10 and the closing spring guide 202 will be described with reference to FIGS. 1, 2, 5, and 6. The closing spring 10 is a spring that performs a closing operation by being released. The lower end of the closing spring 10 is fixed to the mounting surface 20 a of the frame 20. The closed spring 10 is in the stored state when the movable contact 100 shown in FIG. 1 is in the open state, and is in the released state when the movable contact 100 shown in FIG. 2 is closed.

  The closing spring guide 202 is a part that holds the closing spring 10 in a slidable manner and regulates the release and accumulation of the closing spring 10. The closing spring guide part 202 includes a closing spring receiver 11 and a spring receiver holding part 12. The upper end of the closing spring 10 is fitted to the closing spring receiver 11. A pin 11 a is disposed on the closing spring receiver 11. The spring receiver holding portion 12 is fixed to the mounting surface 20 a of the frame 20.

  The spring receiver holding part 12 is formed with a notch 12a in the vertical direction. A pin 11a of the closing spring receiver 11 is slidably inserted into the notch 12a, and the closing spring receiver 11 is thereby slidably held. As shown in FIGS. 1 and 2, the pin 11 a of the closing spring receiver 11 is connected to the pin 13 a of the closing lever 13 via the closing spring link 14.

  A sliding surface portion 12b (shown by hatching) is provided at a sliding portion between the pin 11a of the closed spring receiver 11 and the notch portion 12a of the spring receiver holding portion 12. Molybdenum disulfide particles are sprayed on the sliding surface portion 12b with a high-speed air stream to form a molybdenum disulfide coating layer. When the closing spring receiver 11 moves downward in the spring receiver holding portion 12, the accumulating force of the closing spring 10 advances, and the engagement surface portion of the closing latch lever 50 of the closing trigger portion 302 and the engagement surface portion of the closing lever 13. The accumulation of the closing spring 10 is regulated by the engagement (state shown in FIGS. 1 and 6). The release of the closing spring 10 is restricted via the closing link 14 and the closing spring receiver 11 by restricting the operation of the closing lever 13 (state shown in FIGS. 2 and 5).

(Circuit trigger part)
The open circuit trigger unit 301 is a part for holding the open state of the open spring 4 and releasing the hold to release the open spring 4. The opening trigger part 301 is demonstrated using FIG. As shown in FIG. 7, the opening trigger portion 301 includes a latch lever 32, a locking lever 40, a latch 41, a latch return spring 42, a trip link 43, a trip lever 44, and a trip lever return spring. 45, a trip lever stop pin 22, and an opening electromagnetic solenoid 60. Among these, the latch lever 32 is fixed to the sub shaft 30. The latch lever 32 has a roller pin 32a rotatably fitted to the tip. The latch lever 32 is disposed adjacent to the locking lever 40.

  The locking lever 40 is rotatably arranged on the closed shaft 3. The locking lever 40 is formed with a protruding support portion 40a, and the pin 21 is attached to the end of the support portion 40a. The pin 21 is fixed to the wall surface of the frame 20. Further, the locking lever 40 is provided with a pin 40 b in the vicinity of the closed shaft 3. Further, the latch lever 40 is provided with a latch shaft pin 40c.

  The latch 41 is rotatably disposed on the latch shaft pin 40 c of the locking lever 40. The tip 41a of the latch 41 is formed as a flat surface or a convex arc surface (that is, a convex cylindrical surface). When the movable contact 100 is in the closed state, the center of the tip 41a of the latch 41 is positioned on a straight line connecting the center of the roller pin 32a of the latch lever 32 and the center of the latch shaft pin 40c of the locking lever 40. It is configured as follows.

  An engagement surface portion 41 b that can be engaged with the roller pin 32 a of the latch lever 32 is provided at the distal end portion 41 a of the latch 41. Molybdenum disulfide particles are sprayed on the engagement surface portion 41b with a high-speed airflow to form a molybdenum disulfide coating layer. The engaging surface portion 41b is configured to engage with the roller pin 32a of the latch lever 32 when the movable contact 100 is in a closed state. Due to the engagement between the engagement surface portion 41b and the roller pin 32a, the roller pin 32a pushes the engagement surface portion 41b toward the center of the rotation axis of the latch 41, thereby stopping the latch 41 from attempting to rotate counterclockwise. . The latch 41 is provided with a latch pin 41c.

  The latch return spring 42 is disposed between the locking lever 40 and the latch 41. The upper end portion of the latch return spring 42 is engaged with the pin 40 b of the locking lever 40. The latch return spring 42 always generates a force that rotates the latch 41 clockwise. That is, the latch 41 receives a rotational force in the clockwise direction from the latch return spring 42, thereby obtaining a force for engaging the tip 41 a of the latch 41 with the roller pin 32 a of the latch lever 32.

  A latch pin 41c of the latch 41 is rotatably attached to the left end of the trip link 43. An elongated hole 43 a is formed at the right end of the tripping link 43. A pin 44a provided at the lower end portion of the tripping lever 44 is slidably inserted into the elongated hole 43a. The trip lever 44 can rotate within a range in which the pin 44a moves in the elongated hole 43a.

  The trip lever 44 is rotatably arranged on the frame 20, and a force that always rotates clockwise is given by the trip lever return spring 45. A trip lever stop pin 22 is fixed to the frame 20 in the vicinity of the trip lever 44. In the open state of the movable contact 100 shown in FIG. 1, the tripping lever stop pin 22 engages with the tripping lever 44, whereby the clockwise rotation of the tripping lever 44 is restricted. Further, the clockwise rotation of the tripping lever 44 is restricted by the tripping lever stop pin 22, so that the clockwise rotation of the latch 41 is also regulated via the tripping link 43.

  The opening electromagnetic solenoid 60 is fixed to the frame 20. The open-circuit electromagnetic solenoid 60 is provided with a plunger 60 a, and a distal end portion of the plunger 60 a is engaged with the tear-off lever 44 so as to be detachable. When an opening command is input, the opening electromagnetic solenoid 60 is configured to move the plunger 60a to the left and rotate the trip lever 44 counterclockwise.

(Circuit trigger part)
The closing trigger portion 302 is a portion that holds the energized state of the closing spring 10 and releases the holding spring 10 to release the closing spring 10. The closing trigger unit 302 will be described with reference to FIG. As shown in FIG. 8, the closing trigger portion 302 includes a closing lever 13, a closing latch lever 50, a closing latch lever return spring 51, a pin 23, and an electromagnetic solenoid 61. Among these, the closing lever 13 is fixed to the closing shaft 3. The closing lever 13 is provided with a claw 13b.

  The closing lever 50 for closing is composed of an L-shaped member, and an L-shaped corner portion is rotatably arranged on the frame 20. A semi-cylindrical portion 50 a is provided in the closing lever 50 for closing, and the semi-cylindrical portion 50 a and the claw 13 b of the closing lever 13 are engaged with each other. At this time, the claw 13b of the closing lever 13 and the semi-cylindrical portion 50a of the closing latch lever 50 are provided with engaging surface portions 13c and 50b that are engaged with each other when the closing spring 10 is energized. Molybdenum disulfide particles are sprayed on the engaging surface portions 13c and 50b with a high-speed air stream to form a molybdenum disulfide coating layer.

  The lower end portion of the closing latch lever return spring 51 is disposed at the right end portion of the closing latch lever 50, and the upper end portion of the closing latch lever return spring 51 is fixed to the frame 20. The closing latch return spring 51 is a compression spring, and a spring force that rotates the closing latch lever 50 in the clockwise direction is always applied. The clockwise rotation of the closing latch lever 50 is restricted by the pin 23 fixed to the frame 20 engaging the right edge of the closing latch lever 50.

  The closing electromagnetic solenoid 61 is fixed to the frame 20. The closing electromagnetic solenoid 61 is provided with a plunger 61a, and the distal end portion of the plunger 61a is engaged with the closing latch lever 50 so as to be detachable. When the closing electromagnetic solenoid 61 receives a closing instruction, the plunger 61a moves upward to rotate the closing latch lever 50 counterclockwise.

  The structural features of the present embodiment are that the sliding surface portion 8 a of the spring receiver holding portion 8 in the open circuit spring guide portion 201, the sliding surface portion 12 b of the spring receiver holding portion 12 in the closed circuit spring guide portion 202, and the latch in the open circuit trigger portion 301. Molybdenum disulfide particles are sprayed on the engagement surface portion 41b of the circuit 41, the engagement surface portion 13c of the closing lever 13 in the closing trigger portion 302, and the engaging surface portion 50b of the closing lever 50 for closing by a high-speed air flow. The point is that a layer was formed. Molybdenum disulfide is a solid lubricant that melts with heat and penetrates deep into the base metal and recrystallizes.

(Opening operation)
The opening operation of the first embodiment will be described. In the open circuit operation, the open circuit trigger unit 301 shifts from the state shown in FIGS. 2 and 7 to the state shown in FIG. 10 through the state shown in FIG. As a result, the holding of the open circuit spring 4 in the stored state is pulled off and the open circuit spring 4 is released, and the movable contact 100 as shown in FIG. 1 from the closed state of the movable contact 100 shown in FIGS. It becomes the open circuit state.

  When the movable contact 100 shown in FIG. 2 is in the closed state, the open circuit trigger unit 301 holds the stored state of the open spring 4 as follows. That is, in the closed state of the movable contact 100 shown in FIG. 2, the open spring 4 is in the accumulating state, and the main lever 2 is subjected to a spring force that the open spring 4 is extended via the open spring link 7. . That is, the main lever 2 always receives torque that rotates clockwise.

  Torque to the main lever 2 is transmitted to the sub lever 31 via the main / sub connecting link 9. This torque acts to always rotate the sub lever 31 counterclockwise. For this reason, the latch lever 32 fixed to the subshaft 30 also tries to rotate counterclockwise. However, in the closed state of the movable contact 100, the engagement surface portion 41b of the latch 41 and the roller pin 32a are engaged. Accordingly, the counterclockwise rotation of the latch lever 32 is restricted, and all the members from the sub-lever 31 to the opening spring 4 that follow the latch lever 32 are held stationary.

  In the state as described above, when the opening electromagnetic solenoid 60 is excited by inputting an opening instruction from the outside, the plunger 60a operates in the left direction (the direction of arrow A in FIGS. 2 and 9). As the plunger 60a moves, the trip lever 44 is pushed by the plunger 60a and rotates counterclockwise as shown in FIG. In conjunction with the counterclockwise rotation of the trip lever 44, the trip link 43 moves to the right while engaging the latch pin 41c of the latch 41, and the latch 41 rotates counterclockwise. When the latch 41 rotates counterclockwise, the engagement between the engagement surface 41b of the latch 41 and the roller pin 32a of the latch lever 32 is released.

  As described above, in the closed state of the movable contact 100, the open spring 4 is in a stored state, and the latch lever 32 is driven by the spring force of the open spring 4 transmitted to the main lever 2 through the open spring link 7. Is receiving counterclockwise rotational force. Therefore, when the engagement surface 41b of the latch 41 and the roller pin 32a of the latch lever 32 are disengaged, the latch lever 32 rotates counterclockwise while pushing the latch 41 away. At that time, the tripping link 43 moves while the elongated hole 43a and the tripping lever pin 44a are engaged. Therefore, it operates independently of the trip lever 44. FIG. 10 shows this state.

  Further, the engagement of the tip 41a of the latch 41 and the roller pin 32a of the latch lever 32 is disengaged, so that the cam lever 33 and the sub lever 31 fixed to the latch lever 32 and the sub shaft 30 are counterclockwise as shown in FIG. Rotate in the direction (arrow B, C direction in FIG. 2). As the sub-lever 31 rotates counterclockwise, the main / sub connecting link 9 and the main lever 2 rotate clockwise (in the direction of arrow D in FIG. 2), and the open spring link 7 and the damper 6 move upward (indicated by arrow E in FIG. 2). Direction).

  Due to the rise of the damper 6, the open-circuit spring receiver 5 also rises while sliding with the sliding surface portion 8 a of the spring receiver holding portion 8. The open spring 4 is released as the open spring receiver 5 rises. As the open spring 4 is released, the main lever 2 rotates clockwise (in the direction of arrow D in FIG. 2), the link lever 1 and the movable contact 100 connected thereto move to the right, and the movable contact 100 Starts the opening operation.

  When the open spring 4 is displaced by a certain distance, the piston 6a comes into contact with the stopper 18 fixed to the upper end portion of the spring receiver holding portion 8, and the braking force of the damper 6 is generated. As a result, the releasing operation of the open spring 4 is stopped, the operation of the open spring link 7 connected to the open spring receiver 5 via the damper 6 is stopped, and the open operation is completed. FIG. 1 shows a completed state of the opening operation. At this time, the tripping link 43 and the tripping lever 44 are returned to almost the same position as in the closed state (FIGS. 2 and 7) by the tripping lever return spring 45. In addition, the latch 41 is also returned to the substantially same position as the closed state (FIGS. 2 and 7) by the latch return spring 42.

(Circuit operation)
Next, the closing operation of this embodiment will be described. In the closing operation, the movable contact shown in FIGS. 2 and 7 is released from the open state of the movable contact 100 shown in FIGS. 1 and 8 by releasing the holding of the closed spring 10 in which the closing trigger portion 302 is in the stored state. 100 closed states are reached.

  In the open state of the movable contact 100 shown in FIG. 1, the center 3 a of the closing shaft 3 is located on the left side of the center axis of the closing link 14, so that the closing lever 13 receives a counterclockwise rotational torque from the closing spring 10. It has gained. The central axis of the closing spring link 14 is an axis connecting the pin 11 a of the closing spring receiver 11 and the center of the pin 13 a of the closing lever 13. However, since the engaging surface portion 13c on the closing lever 13 side and the engaging surface portion 50b on the closing latch lever 50 side are engaged, the counterclockwise rotation of the closing lever 13 is in a stopped state, and the storage spring 10 is stored. The state is in a state of holding.

  From this state, when the closing electromagnetic solenoid 61 is excited by inputting an external command, the plunger 61a operates in the direction of arrow F in FIG. When the plunger 61a operates, the closing latch lever 50 engaged with the plunger 61a rotates counterclockwise (FIG. 8). As a result, the engagement between the engagement surface portion 50b of the closing latch lever 50 and the engagement surface portion 13c of the closing lever 13 is released.

  For this reason, the closing lever 13 which has obtained the counterclockwise rotational torque from the closing spring 10 is rotated counterclockwise (in the direction of arrow G in FIG. 1) by the spring force of the closing spring 10, and the closing spring 10 is shown in FIG. It extends in the direction of arrow H in 1 and is released. With the rotation of the closing lever 13, the closing shaft 3 to which the closing lever 13 is fixed also rotates counterclockwise, and the closing cam 15 fixed to the closing shaft 3 is also in the direction of arrow I in FIG. Rotates counterclockwise. The outer peripheral portion of the closing cam 15 engages with a roller 33a provided on the cam lever 33 on the sub shaft 30 side.

  When the counterclockwise rotation of the closing cam 15 proceeds, the roller 33 a of the cam lever 33 is pushed by the closing cam 15. As a result, the subshaft 30 and the cam lever 33 rotate in the clockwise direction (arrow J direction in FIG. 1), and the sublever 31 fixed to the subshaft 30 also rotates in the clockwise direction (arrow K direction in FIG. 1). The clockwise rotation of the sub lever 31 is transmitted to the main lever 2 through the main / sub connecting link 9, and the main / sub connecting link 9 pushes the pin 2b to the right, so that the main lever 2 is counterclockwise (the direction of the arrow L in FIG. 1). Rotate to.

  As the main lever 2 rotates counterclockwise, the link lever 1 and the movable contact 100 connected thereto move to the left, and the movable contact 100 starts a closing operation. As the main lever 2 rotates counterclockwise, the open spring spring link 7 and the damper 6 are lowered. By the lowering of the damper 6, the open-circuit spring receiver 5 is lowered while sliding on the sliding surface portion 8 a of the spring receiver holding portion 8. As the open spring receiver 5 is lowered, the open spring 4 is compressed and stored.

  Further, while the closing spring 10 is being released, the closing spring link 14 and the closing spring receiver 11 are raised while the pin 11 a of the closing spring receiver 11 slides on the sliding surface portion 12 b of the spring receiver holding portion 12.

  By the way, when the sub shaft 30 rotates clockwise, the latch lever 32 fixed to the sub shaft 30 also rotates clockwise. Therefore, the roller pin 32a of the latch lever 32 is reengaged with the engagement surface portion 41b of the latch 41, and the closing operation is completed. FIG. 2 and FIG. 7 show this state. In this state, since the engaging surface portion 41b and the roller pin 32a are engaged, the roller pin 32a pushes the engaging surface portion 41b toward the center of the rotation axis of the latch 41 and restricts the counterclockwise rotation of the latch 41.

(Function and effect)
According to the present embodiment, the sliding surface portion 8a of the spring receiver holding portion 8, the sliding surface portion 12b of the spring receiver holding portion 12, the engaging surface 41b of the latch 41, the engaging surface portion 13c of the closing lever 13, and the closing engagement member. Molybdenum disulfide particles are sprayed with a high-speed air stream on the engaging surface portion 50b of the stop lever 50 to form a molybdenum disulfide coating layer. In such a molybdenum disulfide film layer, even if the surface is worn, a printing phenomenon occurs in which the molybdenum disulfide layer is transferred.

  Therefore, the sliding surface portions 8a and 12b and the engaging surface portions 41b, 13c, and 50b having the molybdenum disulfide film layer can maintain a high sliding resistance reducing effect for a long period of time. These sliding surface portions 8a and 12b and the engaging surface portions 41b, 13c, and 50b do not need to be filled with lubricating oil and do not require periodic grease-up. Therefore, the maintenance cost can be reduced, and the economy is improved.

  Further, in the present embodiment, since the lubricating oil is not filled, the malfunction of the rare frequency operation portion caused by the deterioration or depletion of the lubricating oil does not occur. Furthermore, since no lubricating oil is used in the present embodiment, there is no possibility that the viscosity of the lubricating oil will decrease and solidify even in a low temperature environment. Therefore, the present embodiment can acquire stable operation characteristics even in a low temperature environment. Moreover, the sliding surface portions 8a and 12b and the engaging surface portions 41b, 13c, and 50b, which are excellent in the sliding resistance reduction effect, are the trigger portions that release the springs 4 and 10 and the guide portions 201 and 202 that hold the springs 4 and 10, respectively. Since it is a part included in the parts 301 and 302, the operational stability of the spring operating mechanism is reliably improved.

[Second Embodiment]
(Constitution)
In the second embodiment, the sliding surface portion 8 a of the spring receiver holding portion 8 in the open circuit spring guide portion 201, the sliding surface portion 12 b of the spring receiver holding portion 12 in the closed circuit spring guide portion 202, and the latch 41 in the open circuit trigger portion 301. At least one of the mating surface portion 41b, the engaging surface portion 13c of the closing lever 13 in the closing trigger portion 302, and the engaging surface portion 50b of the closing latch lever 50 is replaced by a hard carbon coating layer instead of the molybdenum disulfide coating layer. Specifically, it is formed from diamond-like carbon (DLC).

(Function and effect)
In such a second embodiment, the hard carbon coating layer has a low friction coefficient and a high hardness. Among them, DLC has a high hardness, so that the amount of wear is small, the corrosion resistance is excellent, and the influence of the outside temperature is small. Therefore, in the second embodiment, an excellent switchgear operating mechanism that can further improve the durability compared to the first embodiment, has less influence on the low temperature environment, and has more stable operation characteristics. Can be provided.

[Other Embodiments]
Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. These embodiments and their modifications are included in the scope and gist of the invention, and are also included in the invention described in the claims and the equivalents thereof.

  For example, in the above embodiments, compression coil springs are used for the open spring 4 and the close spring 10, but other elastic elements such as a torsion coil spring, a disc spring, a spiral spring, a leaf spring, an air spring, and a tension spring are used. It can also be used. The latch return spring 42, the trip lever return spring 45, and the closing latch return spring 51 are coil springs or torsion coil springs, but other elastic elements such as disc springs, spiral springs, plates, etc. A spring can also be used. Furthermore, the present invention can be applied to an operation mechanism having a plurality of open springs and closed springs.

  In the above embodiment, the solid lubricant layer having the molybdenum disulfide film layer or the hard carbon film layer is the sliding surface portions 8a and 12b or the engaging surface portions 41b, 13c and 50b. Even so, for example, if it is a part where members are in contact, such as a pin and a lever, the place to be formed can be selected as appropriate. Furthermore, as long as the members included in the opening / closing device operating mechanism are in contact with each other, the link mechanism is not limited to the members included in the open circuit spring guide unit 201, the closed circuit spring guide unit 202, the open circuit trigger unit 301, or the closed circuit trigger unit 302. The unit 101 may be used. Further, the solid lubricant layer may have both of the molybdenum disulfide film layer and the hard carbon film layer, but not both.

  The members included in the link mechanism unit 101, the open circuit spring guide unit 201, the close circuit spring guide unit 202, the open circuit trigger unit 301, or the close circuit trigger unit 302 can be appropriately changed. For example, in the above embodiment, the locking lever 40 included in the opening trigger portion 301 is fixed to the frame 20, but the locking lever 40 is eliminated and the pin 40 b of the locking lever 40 is directly attached to the frame 20. It may be fixed. Further, the pin 40b may be integrated with the locking lever 40 or the frame 20.

DESCRIPTION OF SYMBOLS 1 ... Link lever 2 ... Main lever 3 ... Closed shaft 4 ... Opening spring 5 ... Opening spring receiver 6 ... Damper 7 ... Opening spring link 8, 12 ... Spring Receiving / holding portion 9 ... main / sub connecting link 10 ... closing spring 11 ... closing spring receiving 13 ... closing lever 14 ... closing spring link 15 ... closing cam 20 ... frame 21- 23 ... Pin 30 ... Sub shaft 31 ... Sub lever 32 ... Latch lever 33 ... Cam lever 40 ... Locking lever 41 ... Latch 42 ... Latch return spring 43 ... Trip link 44 ... Trip lever 45 ... Trip lever return spring 50 ... Closure latch lever 51 ... Closure latch lever return spring 60 ... Open solenoid solenoid 61 ...・ Electromagnetic solenoid for circuit closing 100 ... moving contact 101 ... link mechanism section 201 ... open spring guide portion 202 ... closing spring guide portion 301 ... open trigger unit 302 ... closed trigger unit

Claims (10)

An opening / closing device operating mechanism for reciprocally driving a movable contact of the opening / closing device to shift the switching device between an open state and a closed state;
An open spring that shifts the movable contact from the closed state to the open state by release;
A closing spring that shifts the movable contact from an open state to a closed state by releasing,
A switchgear operating mechanism characterized in that a solid lubricant layer having a molybdenum disulfide film layer is formed in a portion where members included in the switchgear operating mechanism are in contact with each other. An opening / closing device operating mechanism for reciprocally driving a movable contact of the opening / closing device to shift the switching device between an open state and a closed state;
An open spring that shifts the movable contact from the closed state to the open state by release;
A closing spring that shifts the movable contact from an open state to a closed state by releasing,
A switchgear operating mechanism characterized in that a solid lubricant layer having a hard carbon film layer is formed in a portion where members included in the switchgear operating mechanism are in contact with each other.   The switchgear operating mechanism according to claim 2, wherein the hard carbon coating layer is a coating layer made of diamond-like carbon. An open spring guide portion for holding the open spring;
A closing spring guide for holding the closing spring;
The opening / closing device operation according to any one of claims 1 to 3, wherein a moving surface portion on which the solid lubricant layer is formed is provided on at least one of the open spring guide portion and the closed spring guide portion. mechanism. The open circuit spring guide portion is
An open spring receiver to which one end of the open spring is fitted;
A spring holder holding part for slidably holding the open circuit spring holder,
5. The opening / closing device operating mechanism according to claim 4, wherein the sliding surface portion is provided at a sliding portion between the open spring receiver and the spring receiver holding portion. The closed spring guide portion is
A closing spring receiver to which one end of the closing spring is fitted;
A spring receiver holding portion that slidably holds the closed spring receiver,
The opening / closing device operating mechanism according to claim 4, wherein the sliding surface portion is provided at a sliding portion between the closing spring receiver and the spring receiver holding portion. An open spring trigger for holding and releasing the stored state of the open spring; and
A closing spring trigger for holding and releasing the stored state of the closing spring; and
The switchgear according to any one of claims 1 to 6, wherein an engagement surface portion on which the solid lubricant layer is formed is provided on at least one of the open spring trigger portion and the closed spring trigger portion. Operation mechanism. The opening trigger part is
A latch lever attached to the open spring;
A latch that is detachably engaged with the latch lever;
A release link for pulling the latch to release the engagement between the latch lever and the latch;
A trip lever that engages with the trip link and pulls the trip link;
A trip lever return spring that biases the trip lever toward a return position;
A trip lever stop pin for stopping the trip lever at a predetermined position by engagement with the trip lever;
The opening / closing device operating mechanism according to claim 7, wherein the engaging surface portion is provided at an engaging portion between the latch and the latch lever. The closing trigger unit is
A closing lever attached to the closing spring;
A claw fixed to the closing lever;
A closing lever for closing that engages with the claw so as to be able to come into contact with and release from the claw
A closing latch return spring for closing the closing latch lever toward the return position; and
A closing latch stop pin for closing, which stops the closing latch lever at a predetermined position by engagement with the closing latch lever;
The opening / closing device operating mechanism according to claim 7, wherein the engagement surface portion is provided at an engagement portion between the claw and the closing latch lever.   It has a movable contact and the switchgear operating mechanism according to any one of claims 1 to 9, wherein the movable contact is reciprocally driven to move between an open circuit state and a closed circuit state. Switchgear.

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