JP3567054B2 - Operation mechanism of vacuum circuit breaker - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an operation mechanism of a vacuum circuit breaker.
[0002]
[Prior art]
As a conventional operation mechanism of a vacuum circuit breaker, the inventors have previously disclosed in Japanese Patent Application Laid-Open No. Hei 7-245046.
The present invention has been made to eliminate the bouncing phenomenon of the contacts of the vacuum valve at the time of injection and to reduce the size, because the operation mechanism using the compressed air or the electric motor, which has been conventionally used, is large.
[0003]
[Problems to be solved by the invention]
On the other hand, even if the operating mechanism is on the closing side, the conventional operating mechanism is equipped with a tripping free mechanism that can be freely tripped in order to quickly shut off if there is an accident in the circuit at the time of closing. However, some users may not require the trip free mechanism.
[0004]
However, in the conventional operation mechanism of a vacuum circuit breaker, the number of links and the number of pins for connecting the links also increase, so that the operation mechanism of the vacuum circuit breaker is reduced in size, simplified, and has a longer life. Is an obstacle.
Accordingly, an object of the present invention is to provide a vacuum circuit breaker operating mechanism that can be further downsized.
[0005]
[Means for Solving the Problems]
The operation mechanism of the vacuum circuit breaker according to the first aspect of the present invention is configured such that the other side is supported by the operation shaft, with respect to the other end of the connection link, one end of which is connected to the movable shaft of the vacuum valve via a swing lever . One side of a main link provided with a roller is connected, and a roller for rolling the outer periphery of the input cam is connected to one side of the main link with one end of a linear motion link provided at the other end, and the main link is used for input. A closing spring that is charged by the rotation of the cam and drives the closing cam by discharging to close the vacuum valve via the linear link and the connecting link, and one end is connected to one side of the linear link to release the closing spring. An open-circuit spring that accumulates and releases the vacuum valve via the connecting link by release, a trip catch whose intermediate portion is rotatably supported by the support shaft and one end of which contacts the roller of the main link, and a vacuum valve. The main phosphorus There characterized by comprising a tripping shaft for stopping the rotation of the catch tripping to stop, and a driving unit for energizing the closing spring drives the charged cam.
[0006]
Further, the operating mechanism of the vacuum circuit breaker according to the second aspect of the present invention is configured such that a clutch which is in a locked state by rotation in one direction and is in an unlocked state by rotation in the other direction is fitted to a cam shaft of a closing cam, A passive unit for transmitting the driving force of the driving unit to the camshaft via the clutch is connected to the clutch.
[0007]
According to a third aspect of the present invention, in the operation mechanism for a vacuum circuit breaker, the connecting portions at both ends of the connecting link and the linear motion link are arranged to be substantially straight.
[0008]
In the operation mechanism for a vacuum circuit breaker according to the present invention, the passive portion is a spur gear whose inner periphery is loosely fitted to the clutch, and the catch portion protruding from the spur gear has a groove portion for loose fitting. And a spur gear is connected to the clutch via an energy storage catch formed in the clutch.
[0009]
Further, the operating mechanism of the vacuum circuit breaker according to the invention of claim 5 is characterized in that a main shaft is inserted and a pair of mounting plates are provided for fixing one side of the closing spring and the open-circuit spring to the drive unit.
[0010]
By such means, in the present invention, the number of links for transmitting the operation of the closing cam to the swing lever and the number of connecting shafts connecting these links are reduced.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of an operation mechanism of a vacuum circuit breaker of the present invention will be described with reference to the drawings.
FIG. 1 is a front view showing an embodiment of the operation mechanism of the vacuum circuit breaker of the present invention, and FIG. 2 is a right side view of FIG. 1, showing a state before the closing spring is charged with the vacuum valve in an open state. FIG. 3 is a partially enlarged detailed view showing the periphery of the input cam of FIG.
[0012]
In FIGS. 1, 2 and 3, the side plates 1A and 1B made of a steel plate vertically installed facing the center slightly to the right side of a vacuum circuit breaker (not shown) have upper and middle portions bolted from both sides via spacing bars 1a. The lower ends are fixed to each other by a rectangular spacing plate 1b in a plan view (not shown).
[0013]
The lower ends of these side plates 1A and 1B are fixed to the main frame of the vacuum circuit breaker via the spacing plate 1b, and the upper side is also fixed to the main frame of the vacuum circuit breaker.
Of these, a motor 2 with a speed reducer that expands and stores an input spring, which will be described later, is mounted on a left side of the upper end of the left side plate 1A via a mounting plate 2c. A small-diameter spur gear 2b indicated by a broken line is press-fitted through a key.
[0014]
Below the side plates 1A and 1B, an operation shaft 3 passes laterally through a bearing 1c attached to the side plates 1A and 1B, and both ends are supported by a main frame of a vacuum circuit breaker via bearings.
[0015]
A camshaft 4 extends laterally above the side plates 1A and 1B. Both ends of the camshaft 4 are inserted into the side plates 1A and 1B and supported by bearings 10 shown in detail in FIG. ing.
[0016]
A cam 7 for insertion is press-fitted into the center portion of the camshaft 4 via a key 7a shown in FIG. 3, and a roller clutch 9 which locks the camshaft 4 with respect to both sides of the cam 7 depending on the direction of rotation. Blocks 8A and 8B press-fitted into the circumference are inserted.
[0017]
In these blocks 8A and 8B, a small-diameter stepped portion 8a formed on the outside penetrates the inner periphery of the bearing 10 described above and protrudes outside the side plates 1A and 1B.
The large-diameter annular spur gear 11 is inserted into the stepped portion 8a on the left side of the block 8A, and the upper end of the spur gear 11 meshes with the small-diameter spur gear 2b described above.
[0018]
On the further left side of the spur gear 11, a substantially D-shaped accumulating catch 12 described later with reference to FIG. 4 showing a partial left side view of FIG. The bolts are fixed on the same axis.
[0019]
A slight gap is formed between the energy storage catch 12 and the spur gear 11. As shown in FIG. 4A, a U-shaped groove is formed on the outer periphery of the energy-storing catch 12, and this groove is formed on the upper left side of the spur gear 11 in FIGS. 3 and 4A. A catch pin 11a projecting from the surface is loosely fitted.
[0020]
A strip-shaped leaf spring 12a is suspended from a flat portion formed on the front surface of the energy-storing catch 12, and the upper portion is fixed by a pair of bolts. The lower back surface of the leaf spring 12a is in contact with the front surface of a pin 11b protruding from the lower left side surface of the spur gear 11, as shown in FIGS.
[0021]
The base 14 at the upper end of the manual energy-storing handle 13 is fixed to the stepped portion of the right block 8B with a bolt. On the further right side of the base 14 of the handle 13 for manual energy storage, a storage cam 15 indicated by a chain line in FIGS. 7 to 10 is press-fitted via a key 15b shown in FIG. A closing spring hook 15a protrudes from the upper right side surface of the boss 15c.
[0022]
A hook 16a at the upper end of a closing spring 16 shown by a chain line in FIG. 1 and a solid line in FIG. 2 is inserted into the closing spring hook 15a, and is fixed by a spring pin shown in FIGS. The hook at the lower end of the closing spring 16 is supported by a support shaft 17 provided at the rear of the lower ends of the side plates 1A and 1B shown in FIG.
[0023]
On the upper right side of the side plate 1B, there is provided a storage indicator 29 made of a steel plate having a display portion 29a shown in FIG. 2 hanging vertically at a front end, and the storage display has a rear end penetrating the side plate 1B. It is swingably supported via the pin 29d. A pin 29b is inserted through an intermediate portion of the storage indicator 29, and a roller 29c is inserted into the pin 29b. The roller 29c contacts the upper end surface of the storage display cam 32 in FIG. ing.
[0024]
A rear portion of a band-shaped leaf spring 30 is fixed to an upper end surface of a rear portion of the storage indicator 29 with bolts, and an upper surface of a front end of the leaf spring 30 projects rightward from an upper center of the side plate 1B. The roller 29c is pressed against the storage display cam 32 by this reaction force.
[0025]
Further above the storage indicator 29, a limit switch 31 to be described later is fixed to the side plate 1B, and the roller at the tip of the contact piece 31a of the limit switch 31 contacts the upper surface of the storage indicator 29 in FIG. As a result, the contact piece is bent, and the limit switch 31 is in an ON state.
[0026]
A support pin 18 is provided in front of the lower part of the input cam 7 through the side plates 1A and 1B, and is supported via a bearing (not shown). The front end of an auxiliary link 19 formed in a U-shape in FIG. 1 is inserted and welded to the support pin 18.
[0027]
A pin 19 b is inserted through the rear portion of the auxiliary link 19, and a roller follower 19 a is inserted between the pin 19 and the auxiliary link 19. The upper surface of the roller follower 19a is opposed to the lower end surface of the charging cam 7 with a slight gap.
[0028]
The upper end of a linear motion link 20 formed in a U-shape in a plan view (not shown) and housed vertically between the side plates 1A and 1B is connected to the outside of the roller follower 19a to the pin 19b.
[0029]
Below the auxiliary link 19, a positioning stopper 27 made of a square bar is horizontally provided, and both ends are inserted and fixed to the side plates 1A and 1B. The front ends of the pair of main links 21 are welded to the operation shaft 3 penetrating below the stopper 27.
[0030]
A pin 20a is inserted through a middle and rear portion of the main link 21. The pin 20a is connected to the lower end of the above-described linear link 20 and the upper end of a connecting link 22 which will be described later and which is provided vertically below the linear link 20. The upper end of the rod 24 is fitted as shown in FIG.
[0031]
The lower end of the open spring 28 in the extended state shown in FIG. 2 is locked to the pin 20a, and the hook at the upper end of the open spring 28 is locked to a support shaft (not shown) provided through the side plates 1A and 1B. ing.
[0032]
The upper end surface of the main link 21 is pressed against the lower surface of the stopper 27 as shown in FIG. At the rear end of the main link 21, a roller follower 21a is incorporated via a pin 21b.
[0033]
A support pin 23a is provided below the operation plate 3 through a bearing (not shown) below the side plates 1A and 1B. The support pin 23a is formed of a steel plate having a display portion 23b suspended from the front end. The middle part of the ON / OFF indicator 23 is inserted and welded.
[0034]
The lower end of the connection link 22 described above is connected to the rear end of the on / off indicator 23 via a pin 22a. The lower end of the connecting rod 24 is connected via a pin 25a to a front end of a U-shaped connecting lever 25 in a vertical sectional view (not shown) provided below the main frame of the vacuum circuit breaker via the support shaft 5 via a support shaft 5. ing.
[0035]
A lower end of an insulating rod 26 is connected to a rear end of the connecting lever 25 via a pin 25b, and an upper end of the insulating rod 26 is connected to a movable energizing shaft 6a of the vacuum valve 6 indicated by a chain line.
[0036]
Behind the above-mentioned auxiliary link 19, a support shaft 33a is provided through the side plates 1A and 1B via a bearing 33b, and an intermediate portion of the closing catch 33 is inserted and fixed to the support shaft 33a. The lower end of the rear surface of the input catch 33 is in contact with the front surface of a positioning stopper shaft 34a provided through the side plates 1A and 1B.
[0037]
A coil portion of a return spring 34 is loosely fitted to the support shaft 33a, and a locking portion formed on the upper end of the return spring 34 is locked on the rear surface of the upper portion of the closing catch 33, and the lower side of the return spring 34 Is pressed by the return force of the return spring 34 against the upper surface of the stopper shaft 34a described above.
[0038]
A loading shaft 36 is provided below the support shaft 33a through the side plates 1A and 1B via bearings. The loading shaft 36 has a half-moon portion formed at an intermediate portion. The front surface of the lower claw portion 33c is opposed to the upper rear surface of the half-moon portion of the input shaft 36.
[0039]
On the lower side of the input shaft 36, a trip shaft 35 having substantially the same shape as the input shaft 36 is provided through the side plates 1A and 1B via bearings with the semilunar portion facing downward. Below the trip shaft 35, a support shaft 37b is provided through the side plates 1A and 1B via bearings, and the support shaft 37b has an intermediate portion of the trip catch 37 having the same shape as the above-described catch 33. It is inserted and welded.
The rear upper surface of the claw portion formed in an arc shape at the upper end of the trip catch 37 is in contact with the lower rear portion of the half-moon portion of the trip shaft 37a.
[0040]
A coil portion of a return spring 39 is loosely fitted to the support shaft 37b, and a rear end, which is one side of the return spring 39, comes into contact with a front surface of a stopper shaft 38B provided through the side plates 1A and 1B with a return force. The bent portion formed at the lower end of the hook portion on the other side of the return spring 39 is locked to the lower rear surface of the trip catch 37.
[0041]
As a result, the lower front surface of the trip catch 37 is pressed against the rear surface of the front roller follower 21a by the return force of the return spring 39. A stopper shaft 38A described later with reference to FIGS. 7 to 10 is provided through the side plates 1A and 1B above the rear side of the support shaft 37b. 4D to 4H will be described later.
[0042]
5A is an enlarged detailed view of the input push button 40 and the release push button 41 described above with reference to FIGS. 1 and 2, and FIG. 5B is a left side view of FIG. In both cases, the state before the button is operated and the coil is not excited are shown.
[0043]
5 (a) and 5 (b), the input push button 40 and the release push button 41 shown in FIG. 1 are vertically moved with respect to a support shaft 45 whose right end is inserted and fixed to the side plate 1A. U-shaped bent portions 40a and 41a are inserted and supported to be swingable in the front-rear direction.
[0044]
The upper and lower hooks of a tightly wound return spring 44 are engaged with the opposed portions of the bent portions 40a and 41a on the side plate 1A side, and the opposing portions of the bent portions 40a and 41a are They are pulled together by a predetermined force.
[0045]
Behind each support shaft 45, the tip of the shaft of a stopper bolt 46 is symmetrically fixed to the side plate 1A. The shaft of the stopper bolt 46 It is pressed at the rear end surfaces of the bent portions 40a and 41a.
[0046]
Behind the input push button 40, the input coil 43A is disposed with the tip of the armature 43a inserted in the input coil 43A facing the lower rear portion of the input push button 40, and fixed to the side plate 1A with a pair of bolts. Have been.
[0047]
Similarly, a trip coil 43B of the same product as the closing coil 43A is provided symmetrically behind the trip push button 41, and is fixed to the side plate 1A. The return springs 43c of the armatures 43a and 43b are shown above and below the armatures 43a and 43b.
[0048]
A base end of a J-shaped closing lever 42A is fixed to a closing shaft 36 penetrating further behind the closing coil 43A of the side plate 1A, and an upper portion of the closing lever 42A is an armature of the closing coil 43A. 43a and a predetermined distance from the rear end.
[0049]
The base end of a trip lever 42B, which is the same product as the throw lever 42A, is also fixed to the throw shaft 37a penetrating further behind the trip coil 43B, and the lower portion of the trip lever 42B is also connected to the trip shaft 43a. It is opposed to the rear end of the armature 43b with a predetermined gap.
[0050]
Next, the operation of the operation mechanism of the vacuum circuit breaker thus configured will be described.
Here, the roller clutch 9 described with reference to FIG. 3 rotates in the unlocked state when the camshaft 4 is rotated clockwise as shown by the arrow A when viewed from the right side of FIG. When rotated slightly counterclockwise in the opposite direction, the camshaft 4 is locked and tightened, and the camshaft 4 is assembled in the direction of rotation.
[0051]
First, in the case where the closing spring 16 is charged by electric operation, in FIG. 4D showing a partial left side view of FIG. 1 (the closing spring 16 is shown in FIG. 2), the spur gear is 2b is driven clockwise as indicated by arrow B, and the spur gear 11 meshing with the spur gear 2b is rotated counterclockwise as indicated by arrow C.
[0052]
Then, the catch pin 11a protruding from the upper left side of the spur gear 11 comes into contact with the rear end of the groove formed on the upper part of the energy storing catch 12 as shown in FIG. While the catch 12 is rotated in the counterclockwise direction, the leaf spring 12a is pressed by the pin 11b, and the energy-storing catch 12 further rotates in the counterclockwise direction.
[0053]
When the accumulating catch 12 rotates, the camshaft 4 rotates via the roller clutch 9, and the closing cam 7 and the discharging cam 15 press-fitted into the camshaft 4 are moved together with the closing spring hook 15a. 2 rotates clockwise as indicated by arrow A in the right side view.
[0054]
When the camshaft 4 is further rotated clockwise from the state of FIG. 2, the camshaft 4 is further rotated clockwise from an extension (dead point) of a line connecting the center line of the closing spring 16 and the center of the camshaft 4. The return spring force of the closing spring 16 causes the closing spring hook 15a to rotate clockwise, the roller clutch 9 to rotate freely, the cam shaft 4 to rotate rapidly clockwise, and the cam follower 7a to close as shown in FIG. It stops at the position where it comes into contact with the upper end surface of the catch 33, and the energy storage is completed.
[0055]
Here, with the movement of the position of the outer peripheral surface of the cam 15 for the storage indicator that rotates integrally with the camshaft 4, the storage indicator 29 swings as shown in FIG. 7, and the contact of the limit switch 31 opens. Then, the electric motor 2 stops.
[0056]
However, since the electric motor 2 rotates by inertia even after the limit switch 31 is opened and stops after a certain braking time, even after the limit switch 31 is switched, the camshaft 4 is further driven via the spur gear 11. Is driven, and the mechanism may be damaged. Therefore, the present invention includes a safety mechanism shown in FIG.
[0057]
FIG. 4F shows a state where the position of the spring hook 15a is a dead point of the roller follower 19a to which the return force of the closing spring 16 is applied. The spur gear 11 rotates counterclockwise and is stored by the catch pin 11a. The force catch 12 is rotated counterclockwise.
[0058]
At this time, the leaf spring 12a in contact with the pin 11b has a return force for rotating the energy-storing catch 12 in the clockwise direction. However, since the roller clutch 9 is in the locked state, it does not rotate alone and the spur gear 11 It rotates with rotation.
[0059]
FIG. 4 (g) shows the state at the moment of completion of the energy storage, as in FIG. 7, almost at the same time as the switching of the limit switch 31, the return of the closing spring 16 at the same time as the closing spring hook 15a exceeds the dead point. The force causes the camshaft 4 to be unlocked from the locked state by the roller clutch 9, becomes rotatable counterclockwise and rapidly rotates, and assumes the state shown in FIG. 8.
[0060]
At the same time, the energy-storing catch 12 swings counterclockwise due to the return force of the leaf spring 12a to form a gap at the fitting portion between the catch pin 11a and the energy-storing catch 12, and as shown in FIG. As shown, the rotational force after the switching of the limit switch 31 is absorbed by this gap.
When the energy is manually charged, the handle 13 for manual energy storage shown in FIG. 4C showing the right side view of FIG. 4B is reciprocated by a predetermined angle and number of times.
[0061]
Next, a closing operation by a closing coil or manually will be described.
The closing lever 42A fixed to the closing shaft 36 is driven by exciting the closing coil 43 shown in FIG. 5 or operating the closing push button 40, and the closing shaft 36 is disengaged as shown in FIG. The closing operation is performed by rotating clockwise.
[0062]
In FIG. 6, since the engaging portion of the input shaft 36 with the input catch 33 is a half-moon portion, the input catch 33 swings clockwise by slightly rotating the input shaft 36 clockwise. And swings as shown in FIG. 8 by the return force of the closing spring 16.
[0063]
At the same time, the cam shaft 4, the closing cam 7, the closing spring hook 15 a, and the storage display cam 32 also rapidly rotate clockwise, and the roller follower 19 a and the linear link 20 are moved along the cam surface of the closing cam 7. By pushing down, the connecting rod 24, the connecting lever 25, and the insulating rod 26 are driven to push up the movable-side conducting shaft 6a, and the vacuum valve 6 is turned on.
[0064]
8 is located at a position where the claw portion 7a formed on the outer periphery of the cam is at the lowest position. At this position, the trip catch 37 swings clockwise by the return force of the return spring 39. Then, the rear surface comes to a stop at a position where the rear surface comes in contact with the stopper pin 38A, and further, the input cam 7 swings, and the front surface of the trip catch 37 comes into contact with the roller follower 21a to complete the input. FIG. 9 shows this charging completion state.
[0065]
With the closing operation, the storage indicator 29 operates in accordance with the rotation of the storage display cam 32, the contact of the limit switch 31 is switched, and the on / off indicator 23 switches the connection link 22 connected to the linear link 20. And stops at the position where the roller follower 21a is held by the trip catch 37.
[0066]
On the other hand, the open circuit spring 28 is stretched to store the open circuit force, and is in an energized state to return the linear link 20. Subsequently, when the limit switch 31 is switched, an energy storing operation is performed by electric operation. FIG. 9 shows a state in which the closing spring 16 shifts to an energy storing operation while the vacuum valve is closed.
[0067]
Next, in the tripping operation, the tripping coil 43B shown in FIG. 6 corresponding to FIG. 5 is excited in the case of the electric operation. On the other hand, in the case of manual operation, the tripping push button 41 is pressed and pivoted in the counterclockwise direction as shown in FIG. 6 (a), so that the tripping lever is provided via the armature 43b of the tripping coil 43B. Press 42B to rotate the tripping shaft 37a clockwise.
[0068]
In FIG. 10, when the tripping shaft 35 is slightly rotated in the counterclockwise direction to rotate the half-moon portion formed in the tripping shaft 35 in the counterclockwise direction, the trip catch 37 The auxiliary link 19, the linear link 20, and the main link 21 return to the initial state shown in FIG. 2 or FIG.
[0069]
Therefore, in the operation mechanism of the vacuum circuit breaker thus configured, the releasing force of the charging spring 16 stored by the rotation of the storing cam is transmitted to the connecting lever 25 to connect the vacuum valve 6. The link can be constituted only by the linear motion link 20 and the connecting rod 24 whose upper end is connected to the lower end of the linear motion link 20, and a cam plate having a complicated shape as compared with the operation mechanism shown in the related art can be used. Since only one sheet is used, manufacture and assembly are easy and the number of connecting pins is reduced, so that not only the mechanical life can be increased, but also the storage space and the inertia can be reduced by downsizing.
[0070]
As described above, according to the present invention, the other end of the connection link, one end of which is connected to the movable shaft of the vacuum valve via the swing lever, is supported by the operation shaft on the other side, and the main link provided with rollers is provided. One side is connected, and a roller for rolling the outer periphery of the input cam to one side of this main link is connected to one end of a linear motion link provided at the other end, and the roller is charged and discharged by the rotation of the input cam. A closing spring that drives the closing cam to close the vacuum valve via the direct-acting link and the connecting link, and one end is connected to one side of the direct-acting link and is charged by the discharging of the closing spring to release the connecting link. An open-circuit spring that opens the vacuum valve via an opening, a trip catch whose intermediate portion is rotatably supported by a support shaft and one end of which contacts the roller of the main link, and the main link stops at the position where the vacuum valve is turned on. To catch the trip Connecting a tripping shaft, by providing a driver for energizing the closing spring drives the charged cam, the number and these links links for transmitting the operation of the closing cam to the swing lever to stop the rolling Since the number of connecting shafts to be used is reduced, it is possible to obtain an operation mechanism of a vacuum circuit breaker that can be further downsized.
[Brief description of the drawings]
FIG. 1 is a front view showing an embodiment of an operation mechanism of a vacuum circuit breaker of the present invention.
FIG. 2 is a right side view of FIG.
FIG. 3 is a partially enlarged detailed view of FIG. 1;
FIG. 4 is a partially reduced explanatory view showing the operation of the operation mechanism of the vacuum circuit breaker of the present invention, and FIG. 4 (a) is a view as seen from the left side of the energy storage catch 12 in FIG. (B) is a reduced view of FIG. (C) is a right side view of (b). (D) is an explanatory view of the closing operation by the electric operation, showing a state before the operation, (e) shows a state in which the spur gear 11 is slightly operated, and (f) shows an operation further advanced. (G) shows a state in which the charging of the closing spring is completed by further operation, and (h) shows a state where the spur gear is slightly further extended due to inertia of the storing motor. The figure which shows the state which rotated.
FIG. 5A is a partially enlarged detailed view of FIG. 1; (B) is a left side view of (a).
FIGS. 6A and 6B are diagrams showing the operation of the operation mechanism of the vacuum circuit breaker of the present invention, wherein FIG. 6D shows a state in which a closing push button is operated, and FIG. Show.
FIG. 7 is a right side view showing the operation of the operation mechanism of the vacuum circuit breaker according to the present invention, and corresponds to FIG.
FIG. 8 is a right side view showing the operation of the operation mechanism of the vacuum circuit breaker of the present invention, showing a state in which a vacuum valve is turned on.
FIG. 9 is a right side view showing the operation of the operation mechanism of the vacuum circuit breaker according to the present invention, showing a state in which the vacuum valve is in a closed state and the closing spring has shifted to a charging operation.
FIG. 10 is a right side view showing the operation of the operation mechanism of the vacuum circuit breaker of the present invention, showing a state in which the vacuum valve is in a closed state and the charging of the closing spring is completed.
[Explanation of symbols]
1A, 1B: Side plate, 1a: Spacing bar, 1b: Spacing plate, 2: Electric motor, 2a: Reduction gear, 2b, 11 ... Spur gear, 3 ... Operation shaft, 4 ... Cam shaft, 5, 17 ... Support shaft, 6 ... Vacuum valve, 7 ... Cam, 8A, 8B ... Block, 9 ... Roller clutch, 10 ... Bearing, 11a ... Catch pin, 12 ... Catch for energy storage, 12a, 30 ... Leaf spring, 13 ... Handle for manual energy storage, Reference numeral 14: base, 15: storage cam, 15a: spring hook, 16: closing spring, 18: support pin, 19: auxiliary link, 19a, 21a: roller follower, 20: linear link, 21: main link, Reference numeral 22: connecting link, 23: ON / OFF indicator, 24: connecting rod, 25: connecting lever, 26: insulating rod, 27: stopper, 28: open circuit spring, 29: storage indicator, 31: limit switch, 32 ... Stocking display cam, 33 ... Latch, 34 ... Return spring, 35 ... Release axis, 36 ... Release axis, 37 ... Release catch, 38A, 38B ... Stopper axis, 39,44 ... Return spring, 40 ... Push button for insertion, 41 ... Release Push button, 42A: closing lever, 42B: releasing lever, 43A: closing coil, 43B: releasing coil, 45: support shaft, 46: stopper bolt.

Claims (5)

A connecting link having one end connected to the movable shaft of the vacuum valve via a swing lever, a main link having one end connected to the other end of the connecting link, a roller provided, and the other end supported by the operating shaft ; One end is connected to the one side of the main link, and a linear link provided at the other end with a roller that rolls around the outer periphery of the input cam, and the input cam is stored by being discharged by the rotation of the input cam and released. A closing spring that is driven to feed the precursor vacuum valve through the linear link and the connecting link, and one end of which is connected to one side of the linear link and is charged by the discharging of the closing spring and is charged by the discharging; An open circuit spring that opens the vacuum valve via an opening, a trip catch whose intermediate portion is rotatably supported by a support shaft and one end of which contacts the roller of the main link, and a position where the vacuum valve is turned on. Lord Operation mechanism of the vacuum circuit breaker having a tripping shaft click stops rotation of the catch and the trip to stop, and a driving unit for energizing the closing spring drives the closing cam. A clutch that is locked by one-way rotation and unlocked by rotation in the other direction is fitted to the cam shaft of the closing cam, and the driving force of the drive unit is transmitted to the cam shaft via the clutch. The operating mechanism for a vacuum circuit breaker according to claim 1, wherein a passive part that performs the operation is connected to the clutch. The operating mechanism for a vacuum circuit breaker according to claim 1, wherein a connecting portion at both ends of the connecting link and the linear link is arranged to be substantially straight. The passive portion is a spur gear whose inner periphery is loosely fitted to the clutch, and a groove portion into which a catch pin protrudingly provided on the spur gear is loosely fitted is connected to the spur gear via an energy storage catch formed on the outer periphery. The operating mechanism of a vacuum circuit breaker according to any one of claims 1 to 3, wherein the operating mechanism is connected to a clutch. The vacuum circuit breaker according to any one of claims 1 to 4 , wherein the main shaft is inserted, and a pair of mounting plates for fixing the drive unit and one side of the closing spring and the open-circuit spring are provided. Operation mechanism.

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