JPH0684433A - Control mechanism of switching gear - Google Patents

Abstract

(57) [Abstract] [Purpose] The driving torque applied from the closing spring against the load applied to the drive lever that closes the movable contactor during the closing process is prevented from decreasing, and the outer shape of the operating mechanism in the thickness direction is made small. . A twist spring is used as the closing spring 10, and the spring force of the closing spring 10 is applied to the crank arm 1 by the operating lever 8.
The fulcrum of No. 2 is moved and rotated in addition to the drive lever 26, so that the characteristics are adapted to increase the load due to the closing operation of the movable contactor 2. Also, the closing spring 1
By mounting the torsion spring as 0, the thickness of the outer shape is reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a switchgear operating mechanism for opening and closing switchgear, load switch, and other switchgear.

[0002]

2. Description of the Related Art FIG. 5 is a block diagram showing a conventional opening / closing device having a closing spring attached to an operating mechanism disclosed in, for example, Japanese Patent Publication No. 1-45930, in which a tension spring is used as the closing spring.
Shows the contact open state when the closing spring is stored. 1 is a fixed contact,
Reference numeral 2 denotes a movable contactor which is brought into and out of contact with the fixed contactor to open and close a circuit. Reference numeral 3 denotes a pole shaft on which a pole lever 4 is fixedly arranged at a predetermined interval. Reference numeral 5 denotes an insulating rod for transmitting the opening / closing operation force from the pole shaft 3 to the movable contact 2, 7
Is a release spring, 25 is a driven lever whose one end is fixed to the pole shaft 3, and 26 is a drive lever, which is the boss 2 fixed to one end.
It is rotatably attached to the pole shaft 3 via 7. Two
Reference numeral 8 denotes a first link rotatably connected to the other end of the driven lever 25 via a pin 29, 30 has one end rotatably connected to the first link 28 via a pin 31 and the other end to a drive lever 26. The second roller is connected to the first link 28 via the pin 32, and the rolling roller 34 supported by the pin 33 is provided in the vicinity of the connecting portion with the first link 28. The combination of the first link 28 and the second link 30 constitutes a transmission link 35. 36 is a spring for urging the transmission link 35 in a straightening direction, 37 is a fixed portion fixed to a fixed portion, and the driven lever 25 and the drive lever 26 are in contact with one end of the stopper to restrict the rotation range, and 38 is one end. Is a support member provided with a protrusion 38a and a roller 41 supported by a pin 40, and the other end rotatably supported by a fixed shaft 39. In the supported state, the inner diameter portion of the body portion is a rolling roller. Abutting 34 and first
The link 28 and the second link 30 are supported so that the bending amount of the connecting portion is not more than a predetermined value. 42 is a spring for urging the support member 38 in the counterclockwise direction, 43 is a latch or locking means for locking the support member 38, which is rotatably supported by the fixed shaft 44, and its tip portion abuts against the roller 41. The support member 38 is locked in this state. Reference numeral 45 is a pin fixed to the locking means 43, and the projection 3 is provided when the support member 38 and the locking means 43 are engaged.
8a is engaged to prevent the locking means 43 from rotating more than a predetermined value. Reference numeral 46 denotes a trigger that is attached to the locking means 43, is pushed by the forward movement of the drive shaft 24a of the electromagnet 24, and rotates clockwise together with the locking means 43, and 47 urges the locking means 43 counterclockwise. A spring, 48 is a roller rotatably supported by the pin 32, 49 is a rotatably supported by a fixed shaft 50, and is a locking member that locks and disengages from the roller 48, and 51 is a locking member 49 that is counterclockwise. It is a spring that biases in the direction. The electromagnet 24 is for a trip command, and energizes the drive shaft 24a to move it forward. Reference numeral 52 is a closing spring that gives the input energy,
It is composed of a tension spring, one end of which is connected to the pin 32 and the other end of which is fixed to a fixed portion, and a pair is arranged on both sides in the thickness direction with respect to the drive lever 26.

Next, the operation will be described. In FIG. 5, the support member 38 is engaged with the locking means 43 and maintains the predetermined rotation position. When the closing latch means releases the locking of the closing spring 52 in response to the closing command, energy is applied to the drive lever 26 from the closing spring 52 in this state, the driving lever 26 rotates clockwise, and this motive power is transmitted to the transmission link. It is transmitted to the driven lever 25 via 35. By the way, in the transmission link 35, the node portion formed of the pin 31 provided at the substantially central portion is shown in FIG.
In, it is held in a state of being bent upward. Therefore, when transmitting the turning force, the roller 34 tries to bend further upward, but the roller 34 comes into contact with the inner diameter portion of the body of the support member 38, and further bending movement is blocked. In this way, the transmission link 35 transmits the turning force applied to the drive lever 26 to the driven lever 25 while maintaining a predetermined bending force and a predetermined bending amount. When the driven lever 26 rotates clockwise, the pole shaft 3 to which the driven lever 25 is attached also integrally rotates clockwise. As a result, the movable contactor 2 is moved to the fixed contactor 1 side via the pole lever 4 and the insulating rod 5, and is closed. Along with this series of operations, the opening spring 7 attached to one end of the pole lever 4 is charged. Further, in the closed state of both the contacts 1 and 2, by engaging the locking member 49 with the roller 48, even if the driving force for urging the movable contact 2 in the contact closing direction is released, the opening spring is released. This opening device can be kept closed by overcoming the opening force provided by 7. This state is shown in FIG.

In FIG. 6, when an opening command is given to the switchgear, the electromagnet 24 is excited, the drive shaft 24a moves forward to the right, and the trigger 46 rotates clockwise. As a result, the locking means 43 also rotates clockwise and the roller 41
Disengages with. At this time, the driven lever 25 receives the opening driving force by the opening spring 7 in the counterclockwise direction, and this force is transmitted to the driving lever 26 via the transmission link 35. However, since the driving lever 26 is locked by the locking member 49 via the roller 48, the driving lever 26 cannot rotate, and the opening driving force by the opening spring 7 is eventually transmitted by the transmission link 35.
To bend and rotate the support member 38, which is in contact with the rolling roller 34, against the urging force of the spring 42 to push it up. Further, the driven lever 25 overcomes the biasing force of the spring 36 and rotates counterclockwise while bending the transmission link 35, and stops in a state where the other end of the driven lever 25 is in contact with the stopper 37. By this operation, the movable contactor 2
Is also driven in the open circuit direction and separated from the fixed contact 1.
At the same time, as the transmission link 35 bends, one end of the second link 30 abuts against the locking member 49 and pushes it down, and the engagement between the roller 48 and the locking member 49 is released. This state is shown in FIG.

Then, the driving lever 26 is rotated in the same direction by rotating the boss 27 counterclockwise by a manual or electric rotation operation, and the closing spring 52 is extended to store energy. The supporting member 3 that has been pushed up by the transmission link 35 while extending the bent state of the transmission link 35 while locking the closing latch means (not shown).
8 is reset to a position where it engages with the locking means 43 by the urging force of the spring 42, and returns to the state of FIG.
A closing latch means (not shown) 2 keeps the energy stored and waits for the next closing operation.

In the conventional operating mechanism described above, FIG.
As shown in the operating load characteristic diagram with respect to the closing spring stroke, the force of the closing spring 52 pulling the drive lever 26 decreases in the course of the closing operation. Therefore, the drive torque around the drive lever 26 reaches a peak of torque before the contact pressure spring force load of the movable contactor 2 is applied, as shown in the drive lever rotation torque characteristic diagram in FIG. When the load is applied, the torque becomes small, and the amount of wasted energy increases.
FIG. 8C shows the positional relationship between the drive lever 26 and the closing spring 52.

[0007]

In the above-mentioned conventional operating mechanism of the opening / closing device, the driving torque around the driving lever 26 by the closing spring 52 is the torque before the contact pressure spring force of the movable contact 2 is applied. When the contactor 2 is closed, the torque becomes small and a large amount of energy is wasted. Further, since the closing springs 52 are attached to both sides of the mechanism portion, there is a problem that the outer shape becomes large in the thickness direction.

The present invention has been made in order to solve the above problems, and prevents the spring force of the closing spring applied to the drive lever from decreasing during the closing process and prevents the operating mechanism from moving in the thickness direction. The purpose is to obtain an operating mechanism for a switchgear with a smaller outer shape.

[0009]

In the operating mechanism of the opening / closing device according to the present invention, a single twist spring is used as the closing spring for rotating the drive lever for the closing operation, and the closing spring is driven with one end side of the closing spring. The lever is connected through a crank arm, and the closing spring is arranged within the range of the thickness of the link means for operation.

[0010]

According to the present invention, the force of the closing spring by the twist spring is applied to the drive lever via the crank arm, and the force of the crank arm pulling the drive lever increases with the rotating operation. The torque also increases as the load increases. Also, the closing spring is a twist spring, and can be miniaturized in the thickness direction.

[0011]

【Example】

Example 1. FIG. 1 is a block diagram of an operating mechanism of a switchgear according to the present invention, showing a contact opened state when a closing spring is released. An operation lever 8 is attached so as to be rotatable around an operation shaft 9, and a crank arm pin 8a and a locking pin 8b are fixed to each other. Reference numeral 10 is a single closing spring (shown by a chain line) which is a torsion spring, which is attached around the operating shaft 9, one end of which is received by the crank arm pin 8a and the other end of which is fixed pin 11.
The crank arm pin 8a is urged counterclockwise. Reference numeral 12 denotes a crank arm (shown by a chain line), one end of which is rotatably attached to the crank arm pin 8a and the other end of which is rotatably connected to a pin 32 of the drive lever 26. Of the connecting holes at both ends of the crank arm 12, the connecting hole at the other end is an oval hole 12a. Thirteen
Is a holding roller rotatably supported by the crank arm pin 8a, and serves as closing spring locking means for engaging with the closing latch 14 to hold the stored state of the closing spring 10. The closing latch 14 is rotatably supported by the fixed shaft 15, and the trigger 46 is mounted in the same manner as the conventional latch 43, the stop lever 54 is also mounted integrally, and the adjusting screw 54 a is brought into contact with the stopper pin 53, The engagement margin between the closing latch 14 and the holding roller 13 can be adjusted.
Similarly, the locking means 43 also includes the stop lever 54 and the adjusting screw 5.
4a is mounted so that the engagement margin between the locking means 43 and the roller 41 can be adjusted. Reference numeral 16 denotes a power storage lever in which one end is fixed to the operation shaft 9 and two pawls 17 are rotatably attached to the other end by a pin 16a. The other ends of the pawls 17 are connected to the guide links 18 by the connecting pins 1.
7a is rotatably connected to each of the connecting pins 17
A guide roller 19 is rotatably supported on a.
Reference numeral 20 denotes a guide lever rotatably supported on the operation shaft 9, and is fixedly held at a predetermined position on a frame (not shown) so as not to follow the rotation of the operation shaft 9. Reference numeral 21 is an interlock lever rotatably attached to a fixed shaft 22, and has a lock pin 21a fixed thereto. Reference numeral 23 is a reset spring for urging the interlock lever 21 in the clockwise direction. Note that 1 to 5, 7, 24, 24a, and 25 to 51 are the same as in FIG.

Next, the operation will be described. In FIG. 1, when the operating shaft 9 is manually or electrically rotated in the clockwise direction to store energy of the closing spring 10, the energy storage lever 16 is integrally rotated. Then, the guide link 18 is pushed down by the crank arm pin 8a, one guide roller 19 abuts on the guide lever 20, and the other pawl 17 is pushed by the crank pin 8a.
The operating lever 8 is simultaneously rotated in the clockwise direction while contacting with. The rotation of the operating lever 8 stores the energy of the closing spring 10 and simultaneously pushes down the crank arm 12.
When the crank arm 12 is pushed down, the drive lever 26
Is rotated counterclockwise by the urging force of the spring 36. Further, when the operation shaft 9 is rotated clockwise, the one guide roller 19 and the guide lever 20 are disengaged, the pawl 17 and the crank arm pin 8a are disengaged, and the holding roller 13 is closed. It engages with the latch 14 and holds the biasing state of the closing spring 10. When the drive lever 26 rotates counterclockwise, the support member 38 pushed up by the rolling roller 34 rotates counterclockwise about the fixed shaft 39, and the roller 41 engages with the latch 43. Then, the closing spring energy storage state shown in FIG. 2 is established. When the operation shaft 9 is rotated clockwise, the locking pin 8b is received by the lock pin 21a, thereby restricting the rotation of the operation shaft 9.

Next, from the state shown in FIG. 2, by biasing the electromagnet 24 on the closing latch 14 side and operating the trigger 46 on this side, the closing latch 14 is rotated counterclockwise, and the closing latch 14 and As the holding roller 13 is disengaged and the energy stored in the closing spring 10 is released, as shown in FIG. 3, the drive lever 26 is rotated in the clockwise direction via the crank arm 12 to move the transmission link 35. Driven lever 2
5 is rotated clockwise to rotate the pole shaft 3. As a result, the movable contactor 2 is closed via the connecting means by the pole lever 4 and the insulating rod 5.

To release the movable contact 2 from the state shown in FIG. 3, the following is done. Similar to the conventional device, when the electromagnet 24 on the locking means 43 side is biased and the locking means 43 is rotated clockwise, the engagement with the roller 41 is released, and the energy stored in the opening spring 7 is used. The pole shaft 3 rotates counterclockwise and the movable contact 2 is opened.

In the closing operation as described above, the torque around the operating lever 8 generated by the energy stored in the closing spring 10 moves the position of the crank arm pin 8a, which is one of the fulcrums of the crank arm 12, while
Since the pulling force is applied to the drive lever 26, the operation load characteristic diagram with respect to the crank arm pulling force stroke shown in FIG. That is, the tensile force increases as the closing spring 10 is released. As a result, FIG.
As shown in the torque characteristic diagram around the drive lever shown in (B), the torque around the drive lever 26 increases with the closing operation. FIG. 4C shows the positional relationship between the drive lever 26, the crank arm 12 and the operation lever 8.

The elliptical hole 12a provided at one end of the crank arm 12 allows the operating shaft 9 to be rotated again to store the closing spring 10 in the closed state shown in FIG.

Example 2. In the first embodiment, the elliptical hole 12 is provided in the connecting hole at one end of the crank arm 12 so that the crank arm 12 is rotatably connected, and the closing spring 10 stores energy regardless of the rotating position of the drive lever 26. However, an oval hole may be provided in the connecting hole at the other end of the crank arm 12. Alternatively, oval holes may be provided in the connecting holes at both ends of the crank arm 12, and the length of each oval hole in this case may be about half that in the case of a single hole. In any case, the oval hole of the crank arm 12 allows the closing spring 10 to store energy without turning the drive lever 26 in the closing state. In the above embodiment, the locking of the closing latch 14 is released by the operation of the electromagnet 24, but it may be manually released.

[0018]

As described above, according to the present invention, the twist spring is used as the closing spring for rotating the drive lever for the closing operation, and the spring force of the closing spring moves the fulcrum of the crank arm by the operating lever. However, since the drive lever is rotated, the performance adapted to the load characteristic in which the load increases due to the closing operation of the movable contact can be obtained. Further, since the closing spring is a twist spring, it can be mounted within the range of the thickness of the link mechanism portion, and the outer shape in the thickness direction can be reduced as compared with the conventional one.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing a contact opened state by closing spring release of an operating mechanism of a switchgear according to Embodiment 1 of the present invention.

FIG. 2 is a configuration diagram showing a contact open state of the operating mechanism of FIG.

3 is a configuration diagram showing a closed state of the operating mechanism of FIG. 2 with a closing spring released.

FIG. 4 is a curve diagram showing operating characteristics of the operating mechanism of FIG.
(A) is a characteristic diagram of the operating load with respect to the crank arm pulling force stroke, (B) is a characteristic diagram of the torque around the drive lever, and (C) is an explanatory diagram showing the positional relationship between the drive lever, the crank arm, and the operation lever of FIG. 1. Is.

FIG. 5 is a configuration diagram showing a contact open state with a closing spring energy stored in an operating mechanism of a conventional opening / closing device.

6 is a configuration diagram showing a closed state of the operating mechanism of FIG. 5 when the closing spring is released.

7 is a configuration diagram showing a contact open state of the operating mechanism of FIG. 6 when the closing spring is released.

FIG. 8 is a curve diagram showing the operating characteristics of the operating mechanism of FIG.
FIG. 4A is an operating load characteristic diagram with respect to the closing spring stroke, FIG. 6B is a driving lever rotation torque characteristic diagram, and FIG. 3C is an explanatory view showing a positional relationship between the driving lever and the closing spring in FIG.

[Explanation of symbols]

 2 Movable contactor 3 Pole shaft 4 Pole lever 5 Insulating rod 7 Opening spring 8 Operating lever 9 Operating shaft 10 Closing spring 12 Crank arm 12a Oval hole 14 Closing latch 16 Storing lever 17 Pawl 25 Driven lever 26 Drive lever 34 Rolling Roller 35 Transmission link 38 Support member 42 Spring 43 Locking means

Claims (1)

[Claims] 1. A pole shaft for connecting the movable contactor by a connecting means to open and close the movable contactor by rotation, an opening spring connected to the connecting means for giving an opening force to the movable contactor, One end is fixed to the pole shaft,
A driven lever that rotates the pole shaft by applying a turning force to the other end side, a drive lever that has one end rotatably supported on the pole shaft side and a turning force is applied to the other end side, the drive lever and the slave lever. Rotatably connected to each other end of the lever and having at least one bendable node between both connection parts,
A transmission link supporting a rolling roller outside the bent portion, which is rotatably supported around one end, receives the rolling roller of the transmission link at the inner diameter portion, and a rotational force is applied in the inner diameter direction by a spring. , A support member whose other end is releasably locked by a locking means, an operation shaft rotatably held by a fixed portion and which is rotatably operated from the outside, and one end of which is rotatably operated on the operation shaft. An operation lever that is supported and has the other end locked to a closing latch at a predetermined rotation position, one end rotatably connected to the other end of the drive lever, and the other end rotatably to the other end of the operation lever. Of the connecting hole at one end and the other end, at least one of which is an elliptical hole, which consists of a crank arm and a torsion spring, is fitted to the operating shaft, and is a spring force for energizing the operating lever. Applying spring, one end is fixed to the operating shaft, The pawl means is connected between the two opposite ends, and is rotated by the rotation of the operating shaft in the spring accumulating direction, and the operating lever is rotated in the same direction via the pawl means to store the closing spring. An operating mechanism for an opening / closing device, comprising an energizing lever for energizing, and the closing latch is adapted to be locked at this position when the operating lever is rotated to a spring energizing position.