JPH0479113A - Operating device for circuit breaker - Google Patents

Abstract

PURPOSE:To obtain a circuit breaker operating device of large spring force, high voltage, and large capacity by providing a connecting mechanism that includes both an abutting connecting portion which puts an energy storage shaft in a turning movement in the direction in which a closing spring is pushed by the turning movement of a drive member caused by a driving device and a non-connecting portion which puts the energy storage shaft in a turning movement through the release of a locking device while not in connection with the drive member. CONSTITUTION:A connecting mechanism 14 is formed in a portion where an energy storage shaft 15 to which a closing spring 5 is connected and a drive member which is disposed on almost the same axis as the energy storage shaft 15 and to which a driving device 38 for providing a force to push the closing spring is connected are opposite to each other. The connecting mechanism 14 is provided with both an abutting connecting portion which puts the energy storage shaft 15 in a turning movement in the direction in which the closing spring 5 is pressed by the turning movement of the drive member caused by the driving device 38 and a non-connecting member which puts the energy storage shaft 15 in a turning movement through the release of a locking device 37 while not in connection with the drive member. Sufficient mechanical strength can thus be obtained even with reduction of the diameter of the connecting mechanism 14 and the spring force of the closing spring can be increased using a small connecting mechanism.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a circuit breaker operating device, and more particularly to a circuit breaker operating device that uses a spring as a closing operation force.

[Prior Art] Generally, circuit breaker operating devices that use a spring for closing operation force are known. For example, a known operating device of this type is disclosed in Japanese Utility Model Application Publication No. 59-85546, which is shown in FIG.

One end of a spring rod 10 is connected to a spring receiver 9 provided at the free end of the closing spring 5 disposed within the spring guide 8, and the other end of this spring rod 10 is connected to a position offset from the center of the winding wheel 4. has been done. Teeth 4a are formed approximately halfway around the outer periphery of the winding wheel 4, and two pawls 2 and 3 are provided so as to be slightly rotatable by meshing with the teeth 4a. This both claws 2,
3 is rotatably supported by an eccentric shaft 1 connected to a drive shaft of a motor (not shown) with its center shifted, and
It is pressed against the outer peripheral surface of the winding wheel 4 by a spring (not shown). Further, a pin 6 is fixed to the winding wheel 4, and a latch 7 engaged with this pin 6 in the illustrated blocked state is held in position by a lever 11 so as to prevent the winding wheel 40 from rotating counterclockwise. A closing electromagnet device 12 that applies a releasing force to this lever 11 is constructed nearby.

In the state shown in the figure, the closing spring 5 is in a stored state. That is, by rotating the drive shaft and the eccentric shaft 1 by a motor (not shown), both pawls 2°3 are pushed upward with each rotation to apply a counterclockwise rotational force to the winding wheel 4, and the spring bar 10 is rotated to the right. This state is maintained by a latch 7 engaged with a pin 6 and a lever 11.

The closing operation is performed by exciting the closing electromagnet fli12. Due to this excitation, the plunger 12'a rotates the lever 11 clockwise to release the latch 7, so the winding wheel 4 rotates counterclockwise due to the biasing force of the closing spring 5, and utilizes this rotational force. A cut-off section (not shown) is turned on.

Another operating device for a circuit breaker using a closing spring is known, as disclosed in Cite Utility Model Publication No. 63-41727, which is shown in FIG.

This operating device arranges the energy storage shaft J5 and the drive shaft 18 on the same axis via the coupling mechanism 14, and connects the spur gear 16 to the motor 1.
3, the energy storage shaft 15 is rotated together with the active shaft 18, and the closing spring 5 whose free end is connected to the energy storage shaft 15 via the crank 24 is stored. When the closing spring 5 is in a stored state, the power storage shaft 15
A latch lever 17 coupled to the latching lever 17 is locked and held by a closing hook 19.

8 and 9 are an enlarged sectional view and side view of the connection mechanism 14 constructed at the connection portion between the energy storage shaft 15 and the drive shaft 18 shown in FIG. 7.

A joint piece 26 is integrally formed at the opposite end of the energy storage shaft 15, and a recess 26a is formed in the joint piece 26. On the other hand, a joint piece 27 is integrally formed on the opposite end of the drive @ 18, and a convex part 27a is formed on this joint piece 27, and a bearing 28 is inserted into the recess 26a of the above-mentioned joint piece 26. The protrusion 27a of the joint piece 27 is inserted. In addition, a series of holes 26b and 27b are formed in the insertion portions of the joint pieces 26 and 27 between the concave portion 26a and the convex portion 27a, and the connecting pins 29 are inserted into these holes 26b and 27b to connect the two. has been done. However, the hole 26 of the joint piece 26
b is formed with some margin in the circumferential direction relative to the connecting pin 29, and there is play in the circumferential direction of both joint pieces 26 and 27 corresponding to this tolerance. .

The charging operation is performed by exciting the charging electromagnet device 12. Due to this excitation, the plunger 12a rotates the closing hook 19 in a clockwise direction to release the latch lever 17, so that the closing spring 5 rotates the accumulating shaft 15 in the direction of the arrow and is fixed to the accumulating shaft 15. The cam 20 is also rotated in the direction of the same arrow. Therefore, the cam 2o is connected to the link mechanism 2
1 is activated to bring the shut-off section 25 into the closed state.

[Problems to be Solved by the Invention] Conventional operating devices have the above-described configuration, and in particular, in the one shown in FIG. When the winding wheel 5 returns, the winding wheel 4 is rapidly rotated, and at this time, the claws 2 and 3 are damaged by the teeth 4a of the winding wheel 4. On the other hand, the operating device shown in FIG. 7 does not cause the above-mentioned damage, but since the connecting pin 29 exists between the recording shaft 18 and the energy storage shaft 15, this connecting pin 29 The spring force of the closing spring 5 is restricted depending on the strength. For this reason, high-voltage, large-capacity circuit breakers such as buffer-type gas circuit breakers, which require a larger closing force than vacuum circuit breakers, require a closing spring with a large -layer spring force, so a small closing spring is required. It has become difficult to realize an operating device of the type shown in FIG. 7 having the coupling mechanism 14.

SUMMARY OF THE INVENTION An object of the present invention is to provide a circuit breaker operating device that has a small-sized connection mechanism between the drive member and the energy storage shaft and is capable of increasing the spring force of the closing spring.

[Means for Solving the Problems] In order to achieve the above object, the present invention includes an accumulating shaft to which a closing spring is connected, and an accumulating shaft that is disposed substantially on the same axis as the accumulating shaft, and a biasing force of the closing spring. A connecting mechanism is configured at a portion facing the driving member to which the driving device is connected, and the connecting mechanism is configured to move the energy storage shaft in a direction that biases the closing spring by rotation of the driving member by the driving device. It is characterized by comprising a rotating abutting connection part and a non-coupling member that rotates the accumulating shaft when the locking device is released without being coupled to the drive member.

[Operation] Since the circuit breaker operating device according to the present invention has the above-described configuration, the abutting connection portion and the non-connection portion formed on the energy storage shaft side and the opposing portion of the drive member are, for example, in the surface facing portion. This is obtained by forming convex portions that protrude in the axial direction, each having a length of about 174 circumferences, and in addition, both of these convex portions are abutted and connected at a certain position with respect to rotation in the circumferential direction. Since the connecting portion can obtain sufficiently greater mechanical strength than the conventional connecting pin, it is possible to increase the size of the closing spring. In addition, since there is a non-coupled portion, when the energy storage shaft side is rotated by the biasing force of the closing spring, this rotational force is not transmitted to the drive member, which may cause a shock to the drive device connected to the drive member. do not have.

[Example code] Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view of a circuit breaker operating device according to an embodiment of the present invention.

The recording shaft 18 and the energy storage shaft 15 are arranged approximately on the same axis,
The opposite parts of the coax 15, 18 are connected by a coupling mechanism 14. The active shaft 18 is rotatably supported on a suitable member by bearings 30 and has a spur gear 16. An existing gear N38 is connected to this spur gear 16.

That is, the spur gear 16 meshes with the small spur gear 31, and the bevel gear 32 connected to the small spur gear 31 meshes with the bevel gear 33 provided on the rotating shaft of the motor 13. Further, another bevel gear 34 meshes with the bevel gear 33, and a handle 36 can be connected to a rotating shaft 35 of this bevel gear 34. Therefore, rotational force can be selectively applied to the recording shaft 18 by the motor 13 or the handle 36.

On the other hand, one end of the closing spring 5 is connected to the energy storage shaft 15 supported by the bearing 60 via the crank 24, and the closing spring 5 is in a biased state at the illustrated position.

Therefore, although a turning force is applied to the energy storage shaft 15 in the direction of the arrow by the closing spring 5, the locking device 37 holds it in the illustrated state. That is, a latch lever 17 is connected to the energy storage shaft 15, and one end of the charging hook 19, which is prevented from rotating counterclockwise by a stopper 40, is engaged with a roller 39 provided at the free end of this latch lever 17. By aligning the input hook 19, the energy storage shaft 15
Rotation by closing spring 5 is prevented. Insertion hook 1
The locking device 37, represented by 9, is released by energizing the closing electromagnetic device 12, thereby releasing the plunger 12a.
This is done by applying a clockwise rotational force to the charging hook 19 against the spring 41.

Further, a cam 20 is coupled to the energy storage shaft 15, and a roller 42 of the free trip link mechanism 21 is in contact with the cam surface of the cam 20. The free tripping link mechanism 21 is configured with three bendable link members 43, 44, and 45, and the movable contact side of the blocking portion 25, whose details are omitted, is connected to the link member 45. Link member 43
．． The roller 46 provided at the connecting portion of the roller 44 is held by the tripping hook 22 which is biased counterclockwise by a spring 49 and whose position is regulated by a stopper 47. The tripping electromagnetic device 23 can apply a clockwise rotational force to the bow removing hook 22 to release the free tripping link mechanism 21. Although the blocking portion 25 is already in the blocking state due to the blocking spring 48 disposed between the free trip link mechanism 21 and the blocking portion 25, the tripping hook 22 is reset by being brought into contact with the roller 46. The connecting bin 5o that connects the link members 44 and 45 is engaged with the notch 51a of the main hook 51 when closing is completed to hold the blocking part 25 in the closed state, and the main hook 51 is rotated clockwise by the stopper 52. Rotation is restricted.

This figure shows the shut-off state of the shut-off part 25, and when the closing electromagnetic device 12 is excited, its plunger 12a rotates the closing hook 19 clockwise, so the latch lever 17 is unlocked. The energy storage shaft 15 is rotated in the direction of the arrow by the closing spring 5. Along with this rotation, cam 2
0 also rotates in the same direction, its cam surface acts on the roller 42 and guides the connecting pin 50 along the lower surface of the main lever 51 to the notch 51a. As a result, the upper end of the link member 45 moves further upward. The cut-off part 25 is turned on by being pushed up.

On the other hand, in the shutoff operation, the tripping electromagnet device 23 is energized, the tripping hook 22 is rotated clockwise, and the shutoff spring 48 is rotated clockwise.
The urging force of the link member 43 is transmitted to the blocking portion 25, and
Rotate clockwise.

Next, prior to the closing operation, the recording device 38 is activated to rotate the drive shaft 18, and this rotational force is transmitted to the energy storage shaft 15 via the coupling mechanism 14. The rotation of the energy storage shaft 15 causes the crank 24 to rotate clockwise to bias the closing spring 5 as shown in the figure.

At this time, the locking system fi! 37 is in the state shown in the figure,
Rotation of the energy storage shaft 15 by the closing spring 5 is prevented.

Incidentally, a cam 53 provided on the energy storage shaft 15 is connected to a limit switch 5 that stops the motor 13 when the closing spring 5 is energized.
4, and a similar cam 55 operates a shock absorber 56 that reduces the impact force when the closing spring 5 is released.

As can be seen from the above description, the coupling mechanism 14 transmits the driving force of the drive device 38 from the drive shaft 18 to the energy storage shaft 15,
On the other hand, the rotational force of the energy storage shaft 15 when the closing spring 5 is released is not transmitted to the drive shaft 18.

Next, the configuration of this coupling mechanism 14 will be explained.

FIG. 2 is a sectional view of the coupling mechanism 14 before the closing spring 5 is biased, and the opposing portions of the drive shaft 18 and the energy storage shaft 15 each have protrusions 15a and 18 having a width of about 174 mm in the circumferential direction.
a is formed. The protrusion 18a of the drive shaft 18 is rotated clockwise by the rotation of the drive shaft 18 by the drive device 38, and is also rotated clockwise by the biased closing spring 5.

When the motor 13 starts from the state shown in FIG.
rotates clockwise, and its protruding portion 18a independently rotates by half a rotation of the drive shaft 18, colliding with the protruding portion 15a of the energy storage shaft 15 as shown in FIG.

The motor 13 continues to operate, rotates the drive shaft 18 once, and then stops in the state shown in FIG. 4. Therefore, in the latter half rotation of the drive shaft 18 from the state shown in FIG. 3 to the state shown in FIG. 4, the energy storage shaft 15 is rotated in the same direction as the drive shaft 18.

In FIG. 4, the closing spring 5 is biased, and the toggle mechanism consisting of the closing spring 5 and the crank 24 is slightly beyond the dead center, so the biasing force of the closing spring 5 causes the accumulating shaft 15 to move. Although it tries to rotate further in the same direction, the same state is maintained by the locking device 37 explained in FIG.

However, when a closing command is given to the closing electromagnetic device 12 and the locking device 37 is released, the accumulating shaft 15 is rotated by a further half turn clockwise due to the biasing force of the closing spring 5, regardless of the drive shaft 18. The blocking part 25 is rotated as described above.
is input, and the state shown in Fig. 5 is reached.

As can be seen from the operation description in FIGS. 3 and 4 above, the protrusion 18a of the drive shaft 18 and the protrusion 1 of the energy storage shaft 15
5a constitutes an abutting connection portion 57 that transmits the rotation from the drive shaft 18 side to the energy storage shaft 15, and as can be seen from the operation explanation in FIGS. 4 and 5, the locking device N37 is released. A non-interlocking portion 58 that does not transmit the rotation by the closing spring 5 applied to the energy storage shaft 15 to the drive shaft is constituted.

Further, the circumferential width of both protrusions 15a and 18a is 1/4
As mentioned above, as shown in FIG. 5, the protrusion 15a of the energy storage shaft 15 rotates due to the biasing force of the closing spring 5, so that the distal end in the rotation direction faces the protrusion 18a. A notch 59 is formed with a width smaller than 174 turns. This is because when the accumulating shaft 15 is rotated by the biasing force of the closing spring 5, the compressed closing spring 5 returns to near its free length, so the accumulating shaft 15 overstrokes and moves toward the drive shaft 18. It is formed to prevent impact from being transmitted. Therefore, a recess is formed in the opposing portion of one of the protrusions 15a and 18a in FIG. A similar effect can be expected even if a disc spring is housed and the disc spring applies an impact upon collision between the protrusions 15a and 18a.

Further, if a sufficient impact effect can be expected by using the disc spring, the circumferential width of the protrusions 15a and 18a may be 174 turns or more.

In a high voltage, large capacity circuit breaker, a large closing operation force is required, and therefore the spring force of the closing spring 5 must be increased, but the connection mechanism 14, which poses a problem in terms of mechanical strength, is described above. In addition, the protruding portion 15a,
Since the connecting mechanism 18a is formed to have a predetermined width in the circumferential direction of both shafts 15 degrees 18, sufficient mechanical strength can be obtained even if the diameter of the connecting mechanism 14 is suppressed. Also, the connecting mechanism 14
may be constructed using the opposing end surfaces of both shafts 15, 18 themselves, or may be constructed by combining a pair of connecting members to each opposite end of both shafts 15, 18 to constitute a connecting device 1a14. You may do so.

Furthermore, both shafts 15 and 18 are integrally formed to form a power storage shaft, and the spur gear 16 is rotatably mounted on the power storage shaft via a bearing, and is opposed to the connecting member on the power storage shaft side. The spur gear 16 may also be supported and constitute a drive-side connecting member.

[Effects of the Invention] As explained above, the present invention includes an abutment connecting portion, which rotates the energy storage shaft in a direction that biases the closing spring by rotation of the drive member by the drive device, on the opposing portion of the drive member. , constitutes a coupling mechanism having a non-coupling portion that rotates the accumulating shaft when the locking device is released without being coupled to the drive member, and the abutment coupling portion extends in the circumferential direction of the surface facing portion. Since it is formed by a protruding part having a width, the mechanical strength of this abutting connection part can be increased, and the connection mechanism is relatively small in the radial direction, and the spring force of the closing spring can be reduced, such as in a buffer type gas circuit breaker. It is possible to obtain a circuit breaker operating device with high voltage and large capacity.

[Brief Description of the Drawings] Fig. 1 is a perspective view of a circuit breaker operating device according to an embodiment of the present invention, and Figs. 6 and 7 are partially sectional front views and perspective views of different conventional circuit breaker operating devices, and FIGS. 8 and 9 are longitudinal sections of the connection mechanism, which is the main part of FIG. 7. FIG. 5... Closing spring, 14... Connection mechanism,
15... Energy storage shaft, 15a... Projection, 18...
Drive shaft, 18a... Protrusion, 25...
Blocking part, 37 Self-locking device, 38... Drive device, 57... Contact connection part, 58... Non-connection part, 5
9...Notch. Figure 6 Figure 2 Figure 3 Figure 4 Figure 5 Figure 7

Claims (1)

[Scope of Claims] 1. A drive member that is rotated by a drive device, an energy storage shaft that is provided approximately on the same axis as this drive member and that biases a closing spring by the rotation of the drive member; a coupling mechanism provided on an opposing portion of the drive member and the energy storage shaft; and a chain that allows the drive device to rotate the energy storage shaft via the drive member to release the biased state of the closing spring. and a locking device, and the circuit breaker operation closes the interrupting part by rotating the accumulating shaft by the closing spring released from the locking device in the same direction as the rotation direction when the closing spring is energized. In the device,
The connection mechanism includes an abutment connection portion that rotates the accumulating shaft in a direction that biases the closing spring due to rotation of the drive member by the drive device, and a An operating device for a circuit breaker, comprising: a non-coupling portion that performs rotation of the energy storage shaft side by the closing spring in a non-coupling manner with the drive member. 2. In the device according to claim 1, the abutment connecting portion is:
An operating device for a circuit breaker, characterized in that it is formed of a protruding portion having a width in the circumferential direction of the driving member and the opposing portion on the energy storage shaft side. 3. In the device according to claim 1, the abutment connecting portion is formed by a protruding portion having a width of approximately 1/4 circumference in the circumferential direction of the opposing portion on the driving member and the energy storage shaft side. Characteristic operating device for circuit breakers. 4. In the device according to claim 1, the protrusion on the energy storage shaft side has a cut that provides a buffering effect between the protrusion of the drive member and the distal end in the rotation direction rotated by the closing spring. A circuit breaker operating device characterized by having a notch.