JP3182042B2 - Switchgear operation mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an operating mechanism for opening / closing a switchgear, for example, a circuit breaker or a switchgear.

[0002]

2. Description of the Related Art FIGS. 14 to 16 are side sectional views showing an example of a conventional operation mechanism.
The same as disclosed in No. 30. FIG. 14 shows a state in which the opening / closing device is in an open state and the closing spring is in an energized state,
FIG. 15 shows a state in which the closing spring is operated to release the opening / closing device in a closed state, and FIG. 16 shows a state in which the opening operation is being performed.

In the drawing, reference numeral 1 denotes a fixed contact, 2 denotes a movable contact that contacts and separates from the fixed contact 1 to open and close an electric path, 3 denotes a pole shaft, and a pole lever 4 and a driving lever 5 are disposed at predetermined intervals on the axis thereof. It is arranged and fixed. Reference numeral 6 denotes an insulating rod for rotatably connecting the pole lever 4 and the movable contact 2 to each other and transmitting an opening / closing operation force from the pole shaft 3 to the movable contact 2. Reference numeral 7 denotes one end of the pole lever 4. An open spring, which is disposed between the unit and a frame (not shown) and biases the pole shaft 3 in a clockwise direction, has one end pivotally mounted on the drive lever 5 via a pin 9, A main link having a roller 10 mounted on the end thereof via a pin 11, a loading cam 12 mounted on a crankshaft 13, the outer edge of which is provided in contact with the roller 10, and a shaft 14 mounted on a fixed shaft 15. Trip cam, 16
Is a connecting link having one end pivotally attached to the trip cam 14 via a pin 17 and the other end pivotally attached to the main link 8 via a pin 11, and 18 a pin 19 via the trip cam 14 via a pin 19. A roller 20 is pivotally mounted on a fixed shaft 21, and one end of the latch 20 is engaged with the roller 18.
2 is mounted on a fixed shaft 23, one end of which is connected to the latch 20.
A trigger 24 is provided in engagement with the trigger 22. A trigger 24 is an electromagnet for commanding a trip, and its drive shaft 24a is provided in engagement with one end of the trigger 22. 25 is a closing spring, one end of which is rotatably mounted on a pin 12a fixed to the closing cam 12,
The other end is rotatably mounted on a frame (not shown) with a pin 26 to apply a biasing force to the input cam. Reference numeral 27 denotes a closing latch, which is a latch roller 12b provided on the closing cam 12.
And is rotatably mounted on a frame (not shown) by a pin 28.

Next, the operation of the above device will be described.
FIG. 14 shows the closed spring accumulating state in the open state. In FIG. 14, when the closing command is output, the crankshaft 13 and the closing cam 12 mounted on the crankshaft 13 are driven counterclockwise by the closing drive device (not shown). This input cam 1
With the rotation of 2, the roller 10 provided in contact with the outer edge of the input cam 12 is driven in a direction away from the crankshaft 13, but the roller 10 is connected to the trip cam 14 via the connection link 16. Therefore, the circular motion is performed counterclockwise around the pin 17. For this reason, a driving force is transmitted to the pole shaft 3 via the main link 8 connected to the roller 10 and the driving lever 5, and the pole shaft 3 is rotated counterclockwise. This pole shaft 3
Is rotated counterclockwise, the movable contact 2 is driven toward the fixed contact 1 via the pole lever 4 fixed to the pole shaft 3 and the insulating rod 6 connected to the pole lever 4. , The two contacts 1 and 2 are closed. With this series of operations, the release spring 7 attached to one end of the pole lever 4 is charged. FIG. 15 shows a state in which the closing operation has been completed. In FIG. 15, when an open circuit command is given, the electromagnet 24 is excited and the drive shaft 24a is attracted upward. As a result, the trigger 22 provided in engagement with the drive shaft 24a is driven clockwise, and the engagement with the latch 20 is released. Since the latch 20 engages with the roller 18 above the fixed shaft 21 in FIG. 15, the latch 20 is constantly urged counterclockwise by the force caused by the opening spring 7, and the latch 20 is engaged with the trigger 22. When it comes off, it rotates in the counterclockwise direction, and the engagement with the roller 18 provided on the trip cam 14 is released. By the way, since the pole shaft 3 is urged clockwise by the opening spring 7, the roller 10 connected to the pole shaft 3 via the main link 8 has a relative positional relationship with the pole shaft 3 and the input cam 12. 15 to the right in FIG. For this reason, the trip cam 14 connected to the main roller 10 via the connection link 16 is always receiving a counterclockwise turning force when the circuit is closed, and the engagement with the latch 20 is performed as described above. When it comes off, it rotates counterclockwise. The rotation of the trip cam 14 causes the connection link 16 to rotate.
15, ie, the pin 17 rotates rightward in FIG. As a result, the restraining force for restraining the main roller 10 at the position shown in FIG. 15 is lost, and the main roller 10 moves rightward. Therefore, the pole shaft 3 connected to the main roller 10 via the main link 8 rotates clockwise, and is connected to the pole shaft 3 via the pole lever 4 and the insulating rod 6 with the rotation of the pole shaft 3. The movable contact 2 is driven in the direction of the open circuit. FIG. 16 shows this state. After this, by each urging means not shown,
The trip cam 14 and the latch 20 are each rotated clockwise to reset to the state shown in FIG.

As described above, the drive device of the opening / closing device is usually constituted by combining four-bar links. In a closing operation, the driving force is transmitted to the movable contact 2 via these four-bar links, and The closed state is maintained by maintaining the tension state of the four-bar link. Further, in order to cause the opening operation, it is only necessary to break part of the tension of the four-bar link which is in a tension state. As a result, the tension state of the entire link system is broken and the movable contact 2 is driven in the opening direction by the opening spring. You.

Incidentally, as a means for breaking the above-mentioned tension state, in a conventional apparatus, a configuration in which a fixed contact of a four-bar link is displaced has been used. Specifically, the drive lever 5,
One fixed node, ie, a pin 17, of the four-bar link composed of the main link 8 and the connecting link 16 is provided on a rotatable trip cam 14, and when opened, the trip cam 14 is turned counterclockwise. By moving the pin 17 rightward in FIG. 15, the tension state of the four-bar link was broken.

[0007]

Therefore, according to the above structure, as can be seen from FIGS. 14 and 15,
With the operation of the four-bar link, specifically, the movement of the roller 10, the load applied to the pin 17 greatly changed, and therefore, the counterclockwise turning force applied to the trip cam 14 also changed greatly. . Further, the trip cam 14 and the latch 2
When changing from the engaged state to the disengaged state with a load applied as in the relationship of 0, when a large load is applied to the above-mentioned engaging portion, a reliable operation can be performed due to a slippage of the engaging surface or an increase in driving force. Therefore, it is necessary to prevent the load applied to the engaging portion from increasing. In the conventional apparatus, components such as the trip cam 14, the latch 20, and the trigger 22 are arranged in series and the load is sequentially reduced. Was taking the way. That is, in the conventional device, in order to reduce the operating force of the trigger 22, a very large damping ratio is formed at the four-bar link portion,
For this reason, there is a problem in that if a change with time such as friction occurs in the four-bar link portion, troubles such as inability to trip can occur. Further, there are disadvantages in that the number of components is increased and the components are complicated, and the assembling work requires a great deal of labor.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and has been made in order to solve the above-mentioned problems, and to provide a switch which is not easily affected by external changes such as friction without attenuating the operating energy of a closing spring and an opening spring. It is intended to provide an operation mechanism.

[0009]

According to a first aspect of the present invention, a closing cam and an energy storage cam are rotatably mounted on a drive shaft, and a closing spring is provided between the two cams. Installed, the trip lever is also rotatably mounted on the drive shaft, the energy storage cam and the energy storage latch are engaged to maintain the energy stored state of the closing spring, and the engagement between the injection cam and the engagement latch is released. By causing the tripping lever to rotate by the remaining stored energy of the closing spring, the closing operation of the closing cam is performed by the stored energy of the closing spring.
A drive lever rotatably connected to one end of the trip lever is driven to open and close the contacts of the switch.

According to a second aspect of the present invention, a closing cam, an energy storage cam,
And the trip lever is rotatably mounted on the drive shaft, the closing spring is installed between the closing cam and the energy storing cam, the trip spring is installed between the trip lever and the energy storing cam, and the energy storing cam and the energy storing cam are stored. The closing latch is engaged to hold the charged state of the closing spring, and the closing of the closing cam and the closing latch is released to rotate the closing cam with the stored energy of the closing spring, thereby causing the trip lever and the trip. By releasing the latch, the trip lever is rotated by the stored energy of the trip spring, and the drive lever rotatably connected to one end of the trip lever is driven to open and close the contact of the switch. Things.

According to a third aspect of the present invention, an initial load is not applied to the closing spring when the contact of the switch is in the contact opening state, the operating mechanism is in the reset state, and the closing spring is in the released state. is there.

According to a fourth aspect of the present invention, the rotational position of the closing cam and the energy storing cam is regulated when the contact point of the switch is in the open state, the operating mechanism is in the reset state, and the closing spring is in the released state. , The initial load is applied to the closing spring.

According to a fifth aspect of the present invention, when the contacts of the switch are in the contact opening state and the closing spring is in the released state, the closing cam engages with the closing latch and the trip latch engages with the trip lever. The trip latch and the trip lever are engaged during the charging process of the closing spring.

According to a sixth aspect of the present invention, when the switch is tripped, the engagement of the energy storage cam and the energy storage latch is released by the rotation of the trip lever, and the closing cam, the energy storage cam, and the trip lever are reset. Things.

According to a seventh aspect of the present invention, at the time of the closing operation, the driving lever is pushed out by the outer edge of the closing cam to rotate the main shaft lever, and the switch is formed by changing the curved shape of the outer edge. This controls the closing operation of the contact.

According to an eighth aspect of the present invention, the drive lever and the main shaft lever are engaged with each other by the curved portion of the drive lever and the roller of the main shaft lever. It is made to be concentric around the center.

According to a ninth aspect of the present invention, a curved portion of the drive lever is provided with an inflection portion that escapes in the trip direction, or the length of the curved portion is changed.

According to a tenth aspect of the present invention, the drive lever and the main shaft lever are connected by a link, and the link is directed toward the drive shaft when the contacts of the switch are closed.

[0019]

The invention of claim 1 does not attenuate the load force generated from the contact side of the switch as in the prior art and use it for the trip (trip) operation force of the operating mechanism. In addition, the closing operation of the closing cam and the tripping operation of the trip lever are independently controlled by three latches provided in the operation mechanism: the energy-storing latch, the closing latch, and the trip latch. It is also used for trip operation.

According to a second aspect of the present invention, there is provided an energizing operation of the closing spring,
The closing operation of the closing cam and the tripping operation of the trip lever are independently controlled by three latches, an energy storage latch, a closing latch, and a trip latch provided in the operation mechanism, and the stored energy of the closing spring is used for the closing operation. The energy stored in the trip spring is used for the trip operation.

According to a third aspect of the present invention, the initial load is prevented from being applied to the closing spring in the reset state, and the energy of the closing spring is operated between the initial load 0 and a predetermined final load. it can. Also, the mounting of the closing spring can be performed with the initial load being zero, so that the assembly is simplified.

According to a fourth aspect of the present invention, an initial load is applied to the closing spring, and the energy at the time of the trip operation of the closing spring is freely set.

According to a fifth aspect of the present invention, when the operating latch is not engaged with the closing cam in the reset state of the operating mechanism, the trip lever is set in a free state even if the energy storage cam is rotated by mistake. Avoid opening and closing contacts.

According to a sixth aspect of the present invention, the closing cam, the energy storage cam, and the trip lever are automatically reset after the trip operation.

According to a seventh aspect of the invention, the closing operation speed of the switch contact is controlled by changing the outer edge of the closing cam.
For example, if the uneven surface of the outer edge is made smooth, the closing operation of the contact can be performed slowly.

According to the invention of claim 8, the drive lever is rotated from the opening force on the contact side by making the curved portion of the drive lever concentric about the drive shaft in the closed state of the switch contact. No component force is generated.

According to the ninth aspect of the present invention, the trip operation is controlled by changing the curved shape of the drive lever.

According to the tenth aspect of the present invention, the link is oriented in the direction of the drive shaft in the closed state of the contact of the switch, so that the closed state can be stabilized. Trip operation can be performed.

[0029]

【Example】

Embodiment 1 FIG. [Structure of Embodiment 1] Hereinafter, Embodiment 1 of the present invention will be described with reference to the drawings. 1 is an assembled perspective view showing a switch operating mechanism according to a first embodiment, FIG. 2 is a reset state diagram (switch open circuit) of the switch operating mechanism, FIG.
4 shows a closing state diagram (switch open circuit), FIG. 5 shows a trip state diagram (switch opening circuit), and FIGS. 6, 7, and 8 show the energy storage cam, the closing cam, and the trip in the state of FIG. 2, respectively. It is the figure which showed the external view of the lever.

In the drawing, reference numeral 29 denotes a drive shaft serving as the center of the operation mechanism, 29a denotes a boss portion rotatably mounted on the drive shaft 29, and 30 denotes two bosses fixed to the boss portion 29a via a hole 30f. An input cam 31 which rotates integrally is a trip lever 31 rotatably mounted on a boss 29a of the drive shaft 29 through a hole 31f, and a spring hook pin 30a fixed to the input cam 30 penetrates. Oval hole 31a that can be moved
have. 32 is a pin 3 on the trip lever 31
A drive lever rotatably connected by 3
Are pinned by pins 34a, and the rollers 34 come into contact with the outer edge 30S of the input cam 30 to roll. Reference numeral 35 denotes an energy storage cam which is rotatably mounted on the drive shaft 29 and has an operation shaft 36 for external operation fixed to the hole 35f. Reference numeral 37 denotes a closing spring.
The other end is fixed to a spring pin 35a fixed to the energy storage cam 35. 370 is a spring guide for guiding the closing spring 37, which is rotatably mounted on the boss 29a of the drive shaft.

Reference numeral 38 denotes a closing latch.
Is rotatably mounted on a frame (not shown) so as to freely engage with a notch portion 30b provided on an outer edge portion of the input cam 30. Reference numeral 39 denotes a trip latch, which is rotatably mounted on a frame (not shown) so that the stepped portion 39a is engaged with a cutout portion 31b provided on the outer edge of the trip lever 31. Numeral 40 designates an energy-storing latch, the step 40a of which has a cut-out portion 35b provided at the outer edge of the energy-storing cam 35.
It is pivotally mounted on a frame (not shown) so as to be disengaged from the frame. These three latches 38, 39, 40
Are respectively turned on by a biasing means (not shown).
8. The trip latch 39 is urged counterclockwise as shown (FIGS. 1 to 8), and the energy storage latch 40 is urged clockwise as shown.

Reference numeral 41 denotes a main shaft lever fixed to a main shaft 42. A roller 43 is rotatably mounted on a tip of the main shaft lever by a pin 44. 45 is a reset spring, one end of which is a closing cam 3
The other end is fixed to a frame (not shown), and the input cam 30 is biased counterclockwise through the spring pin 30a. Reference numeral 46 denotes a stopper, which is fixed to a frame (not shown) at a position where the stopper comes into contact with the trip lever 31.

[Operation of First Embodiment] Next, the operation of the switch operating mechanism of the present embodiment will be described with reference to FIGS. FIG. 2 shows the closing state of the switch, the closing spring 37 is released, and the entire operation mechanism is reset. FIG. 3 shows the closing state of the switch, the closing spring 37 is charged, the trip latch 39 and the trip lever 31 are closed. 4 shows the engaged state, FIG. 4 shows the closing latch 38 operated, the switch is closed, and the closing spring 37 is partially released, and FIG. 5 shows the trip latch 39 operated, the switch is open, and the closing is performed. The spring 37 indicates a completely released state.

In FIG. 2, the closing cam 30 is urged in a counterclockwise direction by a reset spring 45 hooked on a spring hook pin 30a, and the spring hook pin 30a is engaged with the oblong hole 31a of the trip lever 31. The trip lever 31 is also urged counterclockwise.
1 is locked at a position where it contacts the stopper 46,
The rotation of the input cam 30 in the counterclockwise direction is also locked by the contact between the oblong hole 31a of the trip lever 31 and the spring hook pin 30a.

At the above-mentioned biasing position in the counterclockwise direction, the closing cam 3
The notch 30b of No. 0 is engaged with the stepped portion 38a of the closing latch 38, and the rotation of the closing cam 30 in the clockwise direction is locked. On the other hand, the energy storage cam 35 is locked with a fixed positional relationship with the closing cam 30 by the engagement between the spring hook pin 35a and the closing spring 37. The trip latch 39 is held in a state in which the trip latch 39 cannot be engaged with the cutout portion 31b of the trip lever 31 by the abutment portion 39a contacting the outer edge of the energy storage cam 35. Further, the roller 34 provided on the drive lever 32 is fitted in the concave portion of the outer peripheral edge of the input cam 30 and does not push the roller 43 of the main shaft lever 41. Therefore, the movable contact 2 of the switch is connected to the insulating rod. An open state is maintained by an opening spring 7 through the opening 6.

The operating shaft 36 is rotated clockwise from the state shown in FIG. 2 so that the notch 35b of the energy storage cam 35 is engaged with the step 40a of the energy storage latch 40 as shown in FIG. By turning it to the position where it matches, the closing spring 37 is charged via the spring hook pin 35a. At this time, the other end of the closing spring 37 is locked by the spring hook pin 30a of the closing cam 30, so that a biasing force is applied to the closing cam 30 in the clockwise direction. Since 38a is engaged with the cutout portion 30b of the input cam 30, the clockwise rotation is locked.

On the other hand, the trip latch 39 is rotated counterclockwise to engage with the notch 31b of the trip lever 31 because the stepping portion 39a of the trip latch 39 fits inside the notch 35b from the outer edge of the energy storage cam 35. Then, the clockwise rotation of the trip lever 31 is locked.

When the contacts 1 and 2 of the switch shown in FIG. 2 are in the contact opening state and the closing spring 37 is in the released state, the engagement of the trip latch 39 and the trip lever 31 is released by the energy storage cam 35. The reason that the trip latch 39 and the trip lever 31 are engaged during the energy storing process of the closing spring 37 is that if the closing latch 38 is not engaged with the closing cam 30 in the reset state of the operation mechanism, the trip latch 39 will not be engaged. This is because even if the energy storage cam 35 is rotated, the trip lever 31 is set in a free state so as not to open and close the contacts (interlock function).

Next, when the closing latch 38 is rotated clockwise from the charged state of the closing spring 37 shown in FIG. 3, the step 38a of the closing latch 38 and the notch 30b of the closing cam 30 are rotated.
Is disengaged, and the closing cam 30 is rotated clockwise by the stored energy of the closing spring 37 via the spring engaging pin 30a. Then, the roller 34 of the drive lever 32 that has been fitted into the outer edge concave portion of the input cam 30 is pushed out by the outer edge portion 30S of the input cam 30 to move the roller 34 away from the drive shaft 29.

At this time, the drive lever 32 is pivotally connected at one end to the trip lever 31 by a pin 33, and the trip lever 31 is locked in a clockwise direction by a trip latch 39. 3
3 rotates counterclockwise about the center of rotation,
1 is depressed and the spindle lever 4 is depressed.
1 is rotated clockwise, and the main shaft 42 is rotated in the same direction, whereby the movable contact 2 is rotated clockwise via the insulating rod 6, and the switch is closed as shown in FIG. . In this case, the rotation amount of the closing cam 30 is smaller than the rotation amount at which the spring hook pin 30a is abutted against the other end of the oblong hole 31a of the trip lever 31 and the closing spring 37 is first charged. The switching operation of the switch is completed in a small number.

When the drive lever 32 rotates counterclockwise and the outer edge 30S of the input cam 30 contacts the roller 34 of the drive lever 32, the drive lever 3 is closed.
The second curved surface portion 32 a forms a concentric shape about the drive shaft 29, and is in contact with the roller 43 of the main shaft lever 41. For this reason, the drive lever 32 is not affected by the opening spring 7 provided on the main shaft 42 and the load-side opening force applied to the main shaft lever 41 via the main shaft 42 from the fixed contact 1 and the movable contact 2.
Thus, a stable closed circuit state can be formed without generating a component force for rotating the motor.

Next, from the state shown in FIG.
When the is rotated clockwise, the engagement between the stepping portion 39a of the trip latch 39 and the notch portion 31b of the trip lever 31 is released, and the trip lever 31 engages the spring cam pin 30a engaged with the closing spring 37 together with the closing cam 30. Closing spring 3
7 rotates clockwise with the remaining stored energy, and the driving lever 32 is also moved through the pin 33 to the outer edge 30 of the closing cam 30.
It rotates clockwise around the drive shaft 29 along S. As a result, as shown in FIG. 5, the contact between the curved surface portion 32a of the drive lever 32 and the roller 43 of the main shaft lever 41 is released, and the main shaft lever 41 is no longer supported.
, The main shaft 42 rotates counterclockwise to open the movable contact 2 and open the switch.

When the trip lever 31 rotates clockwise, the outer edge of the trip lever 31 comes into contact with the stepping portion 40a of the energy-storing latch 40, and the energy-storing latch 40 rotates counterclockwise to store the energy. The engagement of the force cam 35 with the notch 35b is released.
As a result, the closing cam 30, the trip lever 31,
The energy storage cam 35 is rotated counterclockwise by a reset spring 45 in a state where a constant positional relationship is maintained by the closing spring 37 and the respective spring hook pins 30a and 35a.
It returns to the reset position shown in FIG.

Embodiment 2 FIG. In the first embodiment, the closing spring 3
Although a torsion spring is used as 7, a spiral spring may be used. Alternatively, as shown in FIG. 9, a lever 300 that rotates integrally with the input cam 30 is provided. A tension spring (closing spring) 370 is suspended between the spring retaining pins 35d of the 35, and the tension spring 370 is pulled by the energy storing operation of the energy storing cam 35.
Energy may be given. Further, the same effect can be obtained by suspending the compression spring by reversing the rotation direction arrangement of the spring hook pin 300a of the lever 300 and the spring hook pin 35d of the energy storage cam 35.

Embodiment 3 FIG. In the first embodiment, the curved surface portion 32a of the drive lever 32 forms a constant arc. However, as shown in FIG. 10, the curved surface portion 32a is configured to accelerate the turning operation of the drive lever 32 during the trip operation. Inflection part 32
0 may be provided.

As described in the first embodiment, the trip operation of the drive lever 32 is performed with the remaining energy of the closing spring 37. At this time, if the operation angle for the remaining energy is small or the amount of remaining energy is small, Drive lever 32
It is conceivable that the engagement of the main shaft lever 41 with the roller 43 does not come off. Therefore, by providing the inflection portion 320 on the curved surface portion of the drive lever as shown in FIG. 10, the roller 43 rolls the inflection portion 320 immediately after the trip operation starts, and the force on the load side (contact side) is reduced. Since the drive lever 32 acts on the tripping side, the closing spring 37 is actuated.
A good trip operation can be performed even when the remaining energy is small.

Further, by increasing the length of the trip side of the curved surface portion 32a of the drive lever, when the trip lever 31 completes the rotational acceleration and reaches the maximum speed during the trip operation, the drive lever 32 and the main shaft lever 41 are connected. The engagement can be released, and a favorable trip operation can be performed even when the remaining energy of the closing spring 37 is small as described above.

Embodiment 4 FIG. Further, by changing the curved shape of the outer edge 30S of the input cam 30 on which the roller 34 of the drive lever 32 rolls at the time of the input operation of the operating mechanism, the closing operation of the contact of the switch can be controlled. For example, the uneven shape of the outer edge portion 30S is represented by the following function curve—that is, the drive lever 3
A multi-degree-of-freedom function enclosing the load force from the main shaft lever 41 side (driven side) with respect to the rotation angle of 2;
By setting the output of the input cam 30 by the computer 7 to the drive lever 32 to be calculated and given by-, the pushing speed of the drive lever 32 at the time of input can be controlled, and the closing operation speed of the contact can be controlled.

Embodiment 5 FIG. Further, it is sufficient that at least one of each of the input cam 30, the trip lever 31, and the energy storage cam 35 is formed. For example, as shown in FIGS. The spring hook pin 30a may be inserted through the oblong hole 31a so as to be sandwiched in a sandwich state.

Embodiment 6 FIG. In the first embodiment, when the contact point of the switch is opened, the operating mechanism is in the reset state, and the closing spring is in the released state, the initial load of the closing spring 37 is set to 0, thereby reducing the energy of the closing spring. Occurrence is initial load 0
It was set to operate during the final load determined from.
In addition, as a result, the loading spring can be installed with an initial load of 0, which has the effect of simplifying the assembly of the device. In the sixth embodiment, an initial load is applied to the closing spring 37 by maintaining the mutual positional relationship between the closing cam 30 and the energy storing cam 35 by the drive shaft portion. For example, as shown in FIGS. 11A and 11B, a boss 371 is provided on a spring guide 370 of the closing spring 37 and is fixed to the energy storage cam 35, and the boss 29a of the drive shaft 29 is connected to the spring guide 37. The insertion spring 37 is rotatably inserted into the cylindrical hole 372 and the rotation of the input cam 30 is regulated by the protrusion 373 provided in the cylindrical hole 372.
To the initial load. That is, according to the present embodiment, there is an effect that the energy of the closing spring 37 during the trip operation can be freely set.

Embodiment 7 FIG. In the first embodiment, the closing operation of the closing cam and the tripping operation of the trip lever are performed by one closing spring 37. However, as shown in FIG. 12, the closing spring 37 for closing operation and the trip spring for tripping operation are provided. 50
And the trip spring 50 is suspended between the trip lever 31 and the energy storage cam 35, and the closing spring 37 and the trip spring 50 are simultaneously held when the energy is stored by the energy storage cam 35.
The two springs may be stored and operated individually. In the case of this embodiment, there is an effect that the input energy and the trip energy can be individually set.

Embodiment 8 FIG. In the first embodiment, the operation of the drive lever 32 and the operation of the main shaft lever 41 are performed via the curved surface portion 32a and the roller 44. However, as shown in FIG. The drive lever 32 and the link 50 may be connected to each other to form a four-bar link structure. In this case, if the force from the main shaft lever 41 is set so as to be directed to the drive shaft 29 in the closed state of the main contact, the same effect as in the first embodiment can be obtained. Further, when the trip operation starts, the load (contact) side force acts as the trip force as in the case of the third embodiment, and a good trip operation can be achieved even if the residual energy (trip energy) of the closing spring is small.

Embodiment 9 FIG. In the first embodiment, the center of curvature of the curved surface portion 32 a of the drive lever does not always coincide with the center of the drive shaft 29, and even if a torque is applied to the trip lever 31 via the drive lever 32 from the load (contact) side. There is no problem if the residual energy (trip energy) of the closing spring 37 is larger. In this case, when the center of the curved surface portion 32a of the drive lever is located on the right side in the figure with respect to the center of the drive shaft 29, a force for preventing the trip is generated, and when the center is on the left side in the figure, a force for operating the trip is generated.

[0054]

According to the first aspect of the present invention, the charging operation of the closing spring, the closing operation of the closing cam, and the tripping operation of the trip lever are performed by the storing latch, the closing latch, and the trip latch provided on the operation mechanism. An operation mechanism that can be controlled by three latches, does not need to attenuate the load force generated from the contact side of the switch and applies it to the trip latch unlike the prior art, and provides a stable small power trip operation without variation in operating force. Has the effect. In particular, by using the energy stored in the closing spring for both the closing operation and the trip operation, the above-described effects can be achieved with simple and minimal components.

According to the second aspect of the present invention, it is possible to obtain an operating mechanism capable of performing a stable small force trip operation without variation in operating force, and to separately set the input energy by the closing spring and the trip energy by the trip spring. Can be.

According to the third aspect of the present invention, the initial load is not applied to the closing spring in the reset state, and the energy generation of the closing spring operates between the initial load 0 and the determined final load. be able to. Also, the mounting of the closing spring can be performed with the initial load being zero, so that the assembly is simplified.

According to the fourth aspect of the invention, the initial load is applied to the closing spring, the energy of the closing spring during the trip operation can be set freely, and the energy of the closing spring during the trip operation can be increased.

According to the fifth aspect of the present invention, even if the closing latch or the like becomes incompatible, the trip lever is set in a free state so that the opening / closing operation of the contact is not performed, and the safety is achieved without requiring a special interlock mechanism. Provides a highly operable operating mechanism.

According to the sixth aspect of the present invention, the closing cam, the energy storage cam, and the trip lever can be automatically reset after the trip operation.

According to the seventh aspect of the invention, the closing operation speed of the switch contact is controlled by changing the outer edge of the closing cam. For example, the contact closing operation can be performed slowly by smoothing the uneven surface of the outer edge.

According to the eighth aspect of the present invention, the curved portion of the drive lever is made concentric about the drive shaft in the closed state of the switch contact, so that the drive lever is turned from the opening force on the contact side. Since no moving component force is generated, a stable closed circuit state can be formed.

According to the ninth aspect of the present invention, the trip operation can be controlled by changing the curved surface shape of the drive lever. For example, by providing an inflection portion that escapes in the trip direction on the curved surface portion of the drive lever or increasing the length of the curved surface portion, a good trip operation can be performed even with a small trip energy.

According to the tenth aspect of the present invention, since the link is directed toward the drive shaft in the closed state of the contact of the switch, the closed state can be stabilized, and the trip energy can be reduced. Good trip operation can be performed.

[Brief description of the drawings]

FIG. 1 is an assembled perspective view showing an operation mechanism of a switch according to Embodiment 1 of the present invention.

FIG. 2 is a diagram illustrating a reset state (switch open) of the switch operating mechanism according to the first embodiment of the present invention;

FIG. 3 is a diagram illustrating a state in which a closing spring is energized in the switch operating mechanism according to the first embodiment.

FIG. 4 is a diagram illustrating a closed state of a switch operating mechanism (switch closed) according to the first embodiment;

FIG. 5 is a diagram illustrating a trip state (switch open) of the switch operating mechanism according to the first embodiment.

FIG. 6 is an external view of the energy storage cam in a reset state of FIG. 2;

FIG. 7 is an external view of the closing cam in a reset state of FIG. 2;

FIG. 8 is an outline view of a trip lever in a reset state of FIG. 2;

FIG. 9 is a view showing an operation mechanism of a switch according to a second embodiment.

FIG. 10 is a diagram illustrating a shape of a drive lever according to a third embodiment.

FIG. 11 is an assembled perspective view showing a switch operating mechanism according to Embodiments 5 and 6, and a front view of a spring guide.

FIG. 12 is a view showing an operation mechanism of a switch according to a seventh embodiment.

FIG. 13 is a view showing an operation mechanism of a switch according to an eighth embodiment.

FIG. 14 is a view showing a state of storing a closing spring (opening of a switch) of a conventional switch operating mechanism.

FIG. 15 is a diagram showing a closed state of a conventional switch operating mechanism (switch closed).

FIG. 16 is a diagram showing a trip state of the conventional switch operating mechanism (during opening operation of the switch).

[Explanation of symbols]

29 drive shaft, 30 input cam, 31 trip lever, 32 drive lever, 35 energy storage cam, 36 operating axis, 37 input spring, 38 input latch, 39 trip latch, 40 energy storage latch, 41 main shaft lever.

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-61-193319 (JP, A) JP-A-60-230320 (JP, A) JP-A-61-200622 (JP, A) 154045 (JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) H01H 33/40-33/42

Claims (10)

(57) [Claims] An input cam and an accumulating cam rotatably mounted on a drive shaft, a trip lever similarly rotatably mounted on the drive shaft and operating in association with the input cam, and one end connected to the input cam. By releasing the engagement between the closing spring, the other end of which is fixed to the energy storage cam, the energy-storing latch that holds the energy-storing state of the injection spring by engaging with the energy storage cam, and the engagement with the energy-saving cam. A closing latch that rotates the closing cam by the closing spring, a trip latch that rotates the trip lever by the closing spring by releasing the engagement with the trip lever, and one end of the trip lever rotatably. An operating mechanism for the opening and closing device, comprising: a driving lever that is connected to the main shaft and that is driven by the rotation of the closing cam to open and close the contact of the switch. 2. An input cam, an energy storage cam and a trip lever rotatably mounted on a drive shaft; an input spring fixed at one end to the input cam and the other end fixed to the energy storage cam; A trip spring fixed to the biasing cam and the other end fixed to the trip lever, a biasing latch for holding the biasing state of the closing spring by engaging the biasing cam, and disengaging the closing cam. A trip cam that rotates the closing cam by the closing spring, a trip latch that rotates the trip lever by the trip spring by releasing the engagement with the trip lever, and pivots to one end of the trip lever. An operating mechanism for the switching device, comprising: a driving lever that is freely connected and that rotates a main shaft lever that opens and closes the contacts of the switch when driven by the rotation of the input cam. 3. An initial load is not applied to the closing spring when the contact of the switch is in an open state, the operating mechanism is in a reset state, and the closing spring is in a released state.
Or the operation mechanism of the switchgear according to claim 2. 4. When the contact of the switch is in an open state, the operating mechanism is in a reset state, and the closing spring is in a released state, the rotational positions of the closing cam and the accumulating cam are regulated, and an initial load is applied to the closing spring. The operating mechanism of the opening / closing device according to claim 1 or 2, wherein: 5. The closing cam is engaged with the closing latch and the trip latch is disengaged from the trip lever when the contact of the switch is open and the closing spring is in the released state. The operating mechanism for an opening / closing device according to any one of claims 1 to 4, wherein the trip latch and the trip lever are engaged in the spring energy storing process. 6. The tripping operation of the switch releases the engagement between the energy storage cam and the energy storage latch by rotating the trip lever, and resets the closing cam, the energy storage cam, and the trip lever. The operation mechanism of the switchgear according to any one of claims 1 to 5. 7. A closing lever is rotated by a driving lever pushed out by an outer edge portion of a closing cam during a closing operation, and a closing operation of a switch contact is controlled by changing a curved surface shape of the outer edge portion. The operating mechanism for a switchgear according to any one of claims 1 to 6, wherein 8. A drive lever and a main shaft lever are engaged by a curved surface portion of the drive lever and a roller of the main shaft lever, and the curved surface portion of the drive lever is concentric with the drive shaft as a center in a closed state of a switch contact. The operating mechanism for a switchgear according to any one of claims 1 to 7, wherein the operating mechanism is configured to have a shape. 9. The trip operation is controlled by changing a curved shape of the drive lever.
An operating mechanism of the switchgear according to the above. 10. The drive lever and the main shaft lever are connected by a link, and the link is directed toward the drive shaft when the contact point of the switch is closed. The operation mechanism of the switchgear according to any one of claims 1 to 4.