TWI231944B - Power circuit breaker - Google Patents

Abstract

The present invention provides a type of power circuit breaker consisting of a cut-off controller part, an input controller part, a cut-off spring part, a ratchet wheel, an input spring part, and a contact part. The cut-off controller part uses the main shaft as its center and the input controller part uses the cam shaft as its center. With one end clasped with the main shaft, the cut-off spring part is equipped with a cut-off spring. The ratchet wheel is installed on the cam shaft. The input spring part is equipped with an input spring and the contact part is used for power connection or disconnection. By means of strain energy accumulation or discharging, the cut-off spring and the input spring can be used for switching power connection. Notch parts are formed in the outer peripheral part of the ratchet wheel to avoid the severe contact of a drive claw engaged with the ratchet wheel against ratchets of the ratchet wheel when the power is turned on.

Description

1231944 (1) 发明 Description of the invention [Technical field to which the invention belongs] The present invention relates to a circuit breaker for electric power, and more particularly to a circuit breaker for electric power suitable for high voltage specifications such as a substation. [Prior Art] As power requirements increase, the demand for high-speed, compact, and lightweight power circuit breakers has increased. In order to meet this demand, the operation device of the power circuit breaker often uses a spring driving method when considering maintainability, noise, vibration and safety. An operating device for a circuit breaker using this conventional spring is described in, for example, Japanese Patent Laid-Open No. 9-] 0 6 7 42. In the operating device described in the publication, the input spring force is transmitted to the disconnect spring side via the cam and the main lever during the input operation, and the disconnect spring close contact is compressed. The spring is compressed by a motor and a reduction mechanism. The deceleration mechanism gives power to the ratchet shaft motor, and the driving claw mounted on the ratchet shaft can rotate a ratchet provided on the same axis as the cam. In addition to the driving claws, a plurality of claws are provided to prevent reverse rotation of the ratchet. In addition, in Japanese Patent Application Laid-Open No. 200 2] 0] 96, in order to make the operating device of the circuit breaker operate reliably, the operating device is interrupted by the release of the release spring. Perform the putting action. And the cut-off spring is stored by the release of the input spring, and the input spring is stored by rotating the storage shaft through the electric storage mechanism. A large gear having a missing tooth portion is mounted on the potential storage shaft, and a small gear is engaged with the large gear. The above-mentioned Japanese Patent Application Laid-Open No. 9-]. 0 6 74 2 describes that the cam is disconnected from the main lever when the input operation is stopped 1231944 (2), and the main lever and the lever of the disconnection control unit hold the disconnection spring, and have the second interruption action. The cam and the ratchet rotate by the inertia force beyond the dead point, and then compress the input spring and stop when the inertia force is balanced. Then, 'the cam and the ratchet rotate in the opposite direction by accumulating the kinetic energy of the spring.

However, in this conventional example, the engagement of the driving pawl or the pawl-prevention pawl with the teeth of the ratchet does not cause reversal. and. The plurality of claws forming a plurality of claws for preventing reversal do not disperse and absorb energy, and may cause the claws to be broken due to the load distribution. Therefore, it is necessary to install the ratchet in consideration of the impact force at the same time, and it is difficult to reduce the overall size of the manipulator with a large part. In addition, Japanese Patent Application Laid-Open No. 2 00 01 96 describes that the input spring is wound after the interruption of the input operation to prevent an excessive load on the parts such as the claw or the buckle during the interruption of the input operation. However, this publication describes that the impact load generated during the input operation has a great influence on the ratchet, and as a result, the point that the ratchet becomes larger has not been sufficiently considered.

The present invention has been made in view of the above-mentioned conventional technology, and an object thereof is to reduce an impact force that may be generated when a circuit breaker for electric power is applied. Another object of the present invention is to improve the reliability while miniaturizing the circuit breaker as a whole. In addition, the present invention is directed to achieving all the effects described above. [Summary of the Invention] To achieve the above object, the present invention is characterized in that an electric power circuit breaker for switching electric power input and disconnection using the elastic force of the input spring and the disconnection spring is provided with an input spring link that expands and retracts the input spring and is mounted on the input -6-1231944 (3) The ratchet of the spring link and the driving pawl that engages the ratchet.

And 'in this feature, in addition to the notch portion and the adjacent portion to the notch portion, it is better to form a plurality of gear teeth, and the ratchet and the driving pawl are released when the power is input, and the notch portion of the ratchet is After the driving claw passes, it is better to engage the teeth set on the periphery of the ratchet. In addition, the cutout portion may be formed into a circular shape with a cut end, or formed into a polygonal shape, or cut into a circle shape by a curve, and the cutout portion may be formed at a central angle of about 60 degrees. In order to achieve the above object, other features of the present invention include: a switch having a contact between a fixed contact and a movable contact to switch off and switch off an electric power; a switch-off member and an input member of a potential release switch contact by strain energy; A ratchet wheel that stores strain energy in the input member; and an electric circuit breaker configured to transmit power to the driving pawl of the ratchet wheel, wherein the outer surface of the ratchet wheel has a gear tooth portion that is engaged with the driving pawl; and The notch portion of the gear tooth is not formed, and the driving pawl abuts the notch portion of the ratchet when the operation is performed.

Furthermore, in this feature, when the strain energy stored in the input member is released, a cam and a main lever for storing the strain energy are provided in the disconnecting member to drive the pawl from the notch portion of the ratchet to the peripheral surface of the circle. After jumping, it is better to stop the ratchet from abutting against the gear teeth. In addition, the notch portion of the ratchet may have a shape cut by a straight line connecting two points on the periphery of the ratchet, or a shape cut by a two-point curve surrounding the circle. Further, it is preferable to provide a camshaft having both a ratchet wheel and a cam. [Embodiment] -7- 1231944 (4) An embodiment of the present invention will be described with reference to the drawings.

Fig. 1 is a schematic diagram of an embodiment of a circuit breaker according to the present invention, showing a state of investment. The circuit breaker of this embodiment includes a disconnection control unit having the main shaft 4, an input control unit centered on the protruding shaft 2, and a disconnecting spring that engages the main shaft 4 at one end. A spring part and a contact part that puts or cuts off electric power. Then, the elastic force of the disconnecting spring provided in the disconnecting spring portion is turned off to cut off the electric power, and the elastic force of the spring portion is released to turn on the electric power. The breaking spring is stored by the release of the input spring, and the installation spring is stored by the drive motor of the driving claw. One end of the contact portion is mounted on the main shaft 4, and the other end forms the movable contact 3 of the movable contact 2. The fixed contact 2 9 b of the movable end of the movable contact 3 2 contacts and the rotary terminal forming the rotary contact of the movable contact. Fixed contact 2 9 a.

A second main lever 5 b is attached to the main shaft 4 in the disconnecting spring portion. A disconnect spring link 23 is attached to the other end of the second main lever 5b. When the spindle 4 rotates, the disconnect spring link 25 is moved up and down. The lower part of the cut-off spring link 25 is formed as a hollow, and the piston 36 is fitted on the support of the hollow portion. Connect the bumper 37 to the lower part of the piston. The buffer 37 is filled with a non-compressed fluid such as oil. A cutout is formed at the lower end of the cutout spring link 25, and the cutout spring (breaking member) 26 is wound around the cutout spring link 25 using the bead as a stopper. The upper end of the disconnection spring is pressed by the frame body I. In addition, when the internal fluid of the bumper 37 collides with the piston when the disconnecting spring link 25 collides with the piston, the braking energy is generated. This braking energy is used to stop the movable contact 32 smoothly. The disconnection control unit attaches a first main lever 5 a to the main shaft 4. No. 1) The main bar (5) 1231944 The lever 5a is formed in the shape of a bouncing dart. The main shaft 4 penetrates the central part, and one end is installed with a light 6 'and the other end is a light 7 with a female. The $ Kun 6 can transmit the load from the protrusion 3 when it comes into contact with the outer surface of the protrusion 3 described later. The roller 7 of the first main lever 5a and the second disconnecting latch 8 are formed to be engageable with each other. One end of the second circuit-breaker latch 8 is attached to the rotating shaft, and the other end is provided with an engageable roller 7.

The middle portion of the second circuit breaker lock fastener 8 is provided with a roller for engaging the circuit breaker lock fastener Π, and a return spring 9 is installed at the same time. It can be equipped with a snap-off circuit breaker, a latch 1 and a terminal circuit breaker 1 4 a. Although a freely reversible circuit-breaker latch Π and circuit-breaker trigger M a are formed, the movement is restricted by the reset springs 1, 2, and 5. The rotary shaft of the disconnection trigger 1 4 a is also equipped with a disconnection trigger Mb, and a plunger 17 configured to abut the solenoid of the disconnection trigger 14 b is provided at the disconnection latch 11, the second disconnection latch 8 and The return springs 9, 1 2, and 5 of the circuit breaker trigger 1 4 a form a state that the spring force can often act. The return spring 9 is a compression coil spring, and the return springs 2 and 15 are torsion springs. The above is the disconnection control unit. Inserting into spring 'A ratchet wheel 52 having a plurality of teeth formed on its peripheral portion is mounted on the protruding shaft 2. One end of the input spring link 27 is mounted on the ratchet wheel 5 2 eccentrically. The other end of the input spring link 27 is connected to the spring bearing ^ 5. The input spring 2 8 is positioned around the input spring link 27. One end of the spring (input member) 2 8 is held by a spring bearing body 3 5 and the other end is held by a frame]. The gear teeth of the ratchet wheel 52 are engaged with the driving pawls 5 4 mounted on the gear tooth shaft 5 6. The operation of the driving pawl 5 4 is restricted by the reset spring yellow 5 5 attached to the gear tooth shaft 5 6. Also, the pinion shaft 5 6 is simultaneously mounted with a pinion 5]. 1231944 (6) The protruding wheel shaft 2 is provided with a protruding wheel 3, and a part of the protruding wheel 3 is mounted lightly. An engaging latch 19 is provided to engage the roller 18. The input latch hasp 19 is formed so as to be rotatable around a shaft around which the return spring 20 is wound. An input trigger 22 is provided which can be snap-fitted on a roller in the middle of the input latch 19. The trigger 22 is formed in a T shape, and the intersection of the horizontal bar and the vertical bar forms a rotating shaft. A return spring 23 is wound around the rotating shaft. A plunger 24 is provided so as to be able to contact the solenoid of the trigger 22.

The operation of the operating device constituting the power circuit breaker as described above will be described using the input state diagram of Fig. 2, the disconnection state diagram of Fig. 2, the instantaneous state diagram of Fig. 3, and the interruption state diagram of Fig. 4. In the figure, both the 'open circuit spring 2 6 and the input spring 2 8 are compression coil springs, and both of them are compressed at the same time.

In the state shown in FIG. 1, when the disconnection command is input, the disconnection solenoid excites fe. With the plunger 17 of the disconnect solenoid protruding from the right side in the first figure, press the disconnect trigger 1 4 b. The spring force of the trip trigger 1 4 b exceeds the return spring] 5 to turn the trip trigger 1 4 b in the counterclockwise direction. Thereby, the engagement between the disconnect trigger 1 4 a formed coaxially with the disconnect trigger] 4 b and the disconnect latch lock clasp 11 is released. Open from the trip trigger 1 4 a to form a free-turning trip latch 1 1. Disconnecting Latch Hook] 1 Once it can be turned freely, the second Disconnecting Latch Hook 8 will also turn freely. Among them, the second circuit breaker latch has only been pressed from below by the roller 7 of the main lever 5a, so that it can be turned counterclockwise by the action of the main lever 5a. Further, the return spring 9 is a compression coil spring, and has a function of hindering this operation. When the pressing force of the circuit breaker lock catch 11 from the upper main lever -10- 1231944 (7) 5 a is restricted, the second circuit breaker lock catch 8 can be turned freely and turned in the counterclockwise direction. Further, when the pressing force of the disconnection latch 8 that restricts the disconnection spring 26 to move downward disappears, the disconnection spring 26 releases its spring force and presses the disconnection spring link 25 downward. At this time, the trip spring 26 is in a full stroke state, and the trip spring link 25 presses the piston 36 of the bumper 37.

The disconnection spring link 25 moves downward to rotate the main lever 5 b in the counterclockwise direction, and as the main lever 5 a rotates in the counterclockwise direction. The roller 6 at the end of the main lever 5 a approaches the adjacent cam 3 and continuously rotates the main lever 5 a. Once the main shaft 4 rotates counterclockwise, the movable contact 3 2 connected to it moves downward to open the contact between 2 9 a and 2 9 b. The state in which this interruption operation is suspended is shown in FIG. 2.

From the disconnected state shown in FIG. 2, the description is shown below. Energize the input solenoid. The plunger 24 of the plunger solenoid protrudes toward the left of the figure, and presses one end of the plunger 22 which forms a τ-shape. The pressed trigger 22 is more elastic than the return spring 23, so that the rotating shaft of the trigger 22 is turned counterclockwise. When turning the input trigger 2 2 by the elastic force of the return spring 20, the input latch hasp; [9 turns in the counterclockwise direction. However, the input spring link 27, which is eccentrically mounted on the ratchet wheel 52, reaches the top dead center near the highest position by the rotation of the ratchet wheel 52. This is achieved by a driving force transmitted from a motor (not shown) to the pinion 51 by a driving claw 54. [Enable latch] [9] Rotate counterclockwise 'to release the movement restriction of cam 3. As a result, only the spring force of the spring 28 is applied to the cam shaft 2 of the -11-1231944 (8) on which the cam 3 is mounted. When the spring force 28 of the spring 28 is input, the spring link 27 is moved downward. When the spring link 2 7 is moved, the ratchet 5 2 and the cam shaft 2 mounted thereon rotate in the counterclockwise direction. The cam 3 is rotated by the rotation of the cam shaft 2, and the roller 6 contacting the main lever 5a of the cam moves as a driven roller to follow the cam curve. Thereby, the main lever 5a is rotated clockwise. This state is shown in FIG. 3.

When the input operation is performed so that the cam 3 rotates approximately half a turn counterclockwise, the roller 5 and the cam 3 of the main lever 5a are contacted at the maximum radius position of the cam 3. In this contact, the main lever 5a and the main shaft 4 mounted with the main lever 5a are rotated clockwise at about 60 degrees, and the disconnect spring link 25 connected to the main lever 5b compresses the disconnect spring 26. Once the main shaft 4 rotates, the contacts 2 9a, 29b are closed by the movable contact 32.

The pressing force from the roller 7 acting on the main lever 5 a of the second disconnecting latch 8 is reduced by the cam action of a member provided near the roller 7. Therefore, the second circuit breaker latch hasp 8 rotates clockwise with the force of the open return spring 9 and returns to the original position. Similarly, the trip latch 1 is restored to its original position by the restoring force of the return spring, and the trip trigger 14 is restored to the original position by the restoring force of the reset spring. Fig. 4 shows the state in which the ratchet spring is rotated by opening the spring 28. Since the cam 3 is separated from the main lever 5a, the main lever 5a is rotated counterclockwise by the elastic force of the compressed cut-off spring 26. As described above, the circuit breaker latch Π, the second circuit breaker latch 8 and the circuit breaker 14 are restored to the original positions. Therefore, the roller 7 of the main lever 5 a and the second circuit breaker latch -12-1231944 are restored. (9) 8 engages, maintains the breaking spring force, and maintains the state of the breaker.

After the cam 3 is released from the main lever 5a, the spring 2 8 is released, and therefore, it continues to rotate counterclockwise. Then, the cam 3 exceeds the bottom dead center by the inertia force, and the compression spring 28 is compressed. The cam 3 is stopped when the inertial force of the cam 3 and the elastic force of the compressed input spring 28 are balanced. When the input spring 2 8 which is still compressed after the cam 3 stops is released, the cam 3 is rotated clockwise. After that, the 'cam 3' oscillates from the bottom dead center and stops. However, the ratchet wheel 5 2 which is coaxial with the cam 3 during the "input operation" also rotates counterclockwise. A cutout portion cut into a circular shape of the cutting head is formed around the circumference of the ratchet wheel 52. In addition, the outer periphery] E] / 6 of the ratchet wheel 5 2 adjacent to the missing part is circular but has no gear teeth. In the state shown in Fig. 2, although the driving pawl 5 4 is engaged with the gear teeth of the ratchet wheel 52, the driving pawl 5 4 is disengaged from the engagement with the gear teeth with the rotation of the ratchet wheel 52, and the notch or the peripheral surface is moved.

For example, in a state shown in Fig. 2 in which the driving of the driving claw 54 of a motor (not shown) is stopped, the ratchet wheel 52 is rotated counterclockwise with the spring force of the input spring 28. As the latch teeth of the ratchet wheel 52 and the driving pawl 54 are engaged with each other, they are disengaged. When the driving pawl 5 4 is pushed up to the maximum radial position of the ratchet wheel 5 2 by the teeth of the ratchet wheel 5 2 ', the driving pawl 5 4 is then rotated in the counterclockwise direction by the elastic force of the return spring 5 5. In addition, when the ratchet wheel is turned forward once, it exceeds the smooth peripheral portion of the ratchet wheel 52 and abuts the notch portion. When the driving pawl 5 4 exceeds the notch portion, the driving pawl 5 4 is jumped up from the corner of the ratchet wheel 52 as shown in FIG. 3. Then the ratchet 5 2 as described above, holding the bottom dead center -13- 1231944 (10), and finally stopped. The driving pawl 5 4 that jumps by the corner of the notch portion is rotated in the counterclockwise direction by the elastic force of the return spring 55 and abuts against the gear teeth of the ratchet wheel 52.

When the input operation is stopped, a motor (not shown) is driven to drive the pinion 51 in a counterclockwise direction. Thereby, one side of the pawl shaft 56, which is provided with the driving pawl 5 4 in the counterclockwise direction, is engaged with the tooth lock of the ratchet wheel 52, and the ratchet wheel 52 is rotated in the counterclockwise direction. When the ratchet wheel 5 2 rotates counterclockwise, the input spring link 27 moves upward, and the input spring 28 is compressed. When cam 3 mounted on the camshaft is half-turned, the motor is stopped. At this time, when the spring force of the spring 2 8 is released, the rollers 18 of the cam 3 are engaged with the lever 19, and the input lever 9 is engaged with the trigger 22, so the force of the bomber can be maintained. That is, the input spring 28 is maintained in a compressed state. And 'once the motor is stopped', the driving pawl 5 4 is brought into contact with the ratchet wheel 5 2 without the circumferential cents of the book, and the energy of the motor will not be transmitted to the latching buckle] 9. This state is shown in Figure 1.

According to this embodiment, when the ratchet wheel 52 stops, the driving pawl abuts the ratchet wheel, so the impact immediately after the collision is small, the engagement is stable, and the reliability is improved. In addition, it is possible to reduce the size and weight of the driving claws or ratchets, and to realize the reduction in size and weight of the circuit breaker as a whole. In addition, in this embodiment, although the compression spring is used as the breaking spring and the input spring, other elastic elements such as a disc spring, a coil spring, and a leaf spring may be used. Furthermore, for simplicity, the main lever has a structure capable of moving the movable contact up and down, but a lever or a link may be provided between the main lever and the movable contact to increase the stroke length of the movable contact. -14- 1231944 (11) In this embodiment, the moment when the driving claw jumps is taken as the moment when the cam 3 leaves the main lever 5a, but the two may be completely separated. In addition, in this embodiment, the return springs provided in the input latches and the input triggers are often elastically used, and these return springs are used as torsion springs, but other elastic elements may be used. The jump amount of the driving pawl 54 is determined by the shape of the cutout portion of the ratchet wheel 52. In this embodiment, the center angle is about 60 ° as the notch portion, but the angle of the notch line is not limited as long as it can be engaged to the inner diameter side of the bottom circle of the tooth of the ratchet. The shape of the notch portion is not limited to a shape in which a circle is cut by a straight line, a shape in which a circle is cut by a plurality of straight lines, and a curve of two points on the circumference can be freely connected. That is, the notch portion may be a structure that does not generate excessive impact force on the teeth of the ratchet. Furthermore, the present invention is not limited to the embodiments described above, and can be applied to, for example, an operating device having a plurality of springs or circuit breakers. Although the present embodiment uses two circuit-breaker latches, there may be only circuit breakers or a plurality of circuit-breaker latches. The input side may also be provided without an input latch or has a plurality. As described above, according to the present invention, when the input operation is suspended, the dead center below the ratchet is used as the center to cause the driving pawl to jump between swinging motions and engage the teeth of the driving pawl and the ratchet after stopping the ratchet, thereby reducing the ratchet The impact of the gear teeth and the driving claw 'improves reliability. In addition, components such as driving claws and ratchet wheels can be reduced in size and weight, and the overall size and weight of the circuit breaker can be reduced. [Brief description of the drawings] -15- 1231944 (12) Figure] is a schematic diagram showing one embodiment of the power circuit breaker according to the present invention, and the state diagram of the compression spring and the input spring at the same time, Figures 2 to 4 FIG. 1 is a diagram illustrating the operation of a circuit breaker, FIG. 2 is a diagram illustrating a transition state, FIG. 3 is a diagram illustrating an input state, and FIG. 4 is a diagram illustrating an interrupted state. Component comparison table

1: frame 2: camshaft 3: cam 4: main shaft 5a: first main lever 5b: second main lever 6: car side 7: roller

9: Return spring 8: 2nd disconnecting latch lock buckle] 1: Disconnecting latch lock buckle] 2: Return spring 1 4: Disconnect trigger] 4a: Disconnect trigger 14b: Disconnect trigger] 5: Return spring I 7: Plunger -16-1231944 (13) 1 8: Roller 1 9: Insert latch 2 0: Return spring 2 2: Trigger 2 3: Return spring 2 4: Plunger 2 5: Disconnect spring link

2 6: Disconnect spring 2 7: Spring-loaded connecting rod 28: Spring-loaded (input member) 2 9 a: Fixed contact fixed contact 2 9 b: Fixed contact fixed contact 3 2: Moveable contactor Moveable contact 3 5: Spring carrier

3 6: Piston 3 7: Shock absorber 5 1: Pinion 5 2: Ratchet 5 4: Drive claw 5 5: Return spring 5 6: Ratchet shaft -17-

Claims (1)

(1) 1231944 Scope of patent application1. An electric circuit breaker is an electric circuit breaker that switches the input and disconnection of electric power by using the spring force of the input spring and the disconnect spring. It is characterized by: The spring link is formed with a ratchet wheel mounted on the spring-loaded link and a driving claw that engages the ratchet wheel. 2. The circuit breaker for electric power according to item 1 of the scope of patent application, wherein the ratchet peripheral portion forms a plurality of gear teeth in addition to the notch portion and a portion adjacent to the notch portion. 3. The power circuit breaker according to item 1 of the scope of patent application, wherein the ratchet and the driving pawl are released when the electric power is applied, and the notch portion of the ratchet gear engages gear teeth provided on the periphery of the ratchet after the driving pawl passes. 4. The circuit breaker for electric power according to item 1 of the scope of patent application, wherein the cutout portion is formed into a round shape with a cut end. 5. The power circuit breaker according to item 1 of the patent application scope, wherein the notch is formed in a polygonal shape. 6. The power circuit breaker according to item 1 of the patent application scope, wherein the notch is formed in a shape of a circle cut by a curve. 7 · The circuit breaker for electric power as described in item 1 of the scope of patent application, wherein the notch is formed at a center angle of approximately 60 degrees. 8 · A circuit breaker for electric power, comprising: a switch having contact points of a fixed contact and a movable contact to switch off an electric circuit and an input circuit breaker; a circuit breaker member and an input member for the above-mentioned contact by a potential release switch capable of strain energy A ratchet wheel that stores strain energy in the input member; and a power circuit breaker configured to transmit power to the ratchet -18- (2) 1231944 wheel, characterized in that the outer surface of the ratchet wheel has A gear tooth portion having a plurality of gear teeth engaged with the claws; and a notch portion having no gear teeth formed therein, and the driving claw abuts against the notch portion of the ratchet when the operation is started. 9. The power circuit breaker according to item 8 of the scope of the patent application, wherein the strain energy of the input member is stored and the cam and the main lever of the stored strain energy are provided on the circuit breaker member. When the notch portion of the ratchet wheel abuts the peripheral surface, after the ratchet wheel causes the ratchet wheel to jump, it stops the ratchet wheel from abutting the tooth portion of the wheel. 10. The power circuit breaker according to item 8 of the scope of patent application, wherein the notch portion of the ratchet wheel is formed in a shape of a straight line connecting two points on the periphery of the ratchet wheel. 11. The power circuit breaker according to item 8 of the patent application scope, wherein the notch portion of the ratchet wheel is formed in a shape cut by a two-point curve around the periphery of the connection circle. 12. The power circuit breaker according to item 8 of the scope of patent application, wherein the notch portion of the ratchet wheel is formed to provide a camshaft to which both the ratchet wheel and the cam are mounted.