JP2679482B2 - Spring energy storage device for switchgear - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spring accumulator for a switchgear which stores a closing spring in a switchgear such as a circuit breaker.

[0002]

2. Description of the Related Art A conventional spring energy storage device of this type has a structure shown in FIG. In the figure, 1 is an output shaft of a motor including a pinion gear, 2 is a drive shaft, 3 is a large first gear that is fixed to the drive shaft 2 and meshes with the output shaft 1, and 4 is a small gear that is fixed to the drive shaft 2. The second gear, 5 is a large third gear meshing with the second gear 4, 6 is a substantially semicircular elongated hole formed concentrically in the third gear 5, and 7 is a lever with its central portion pivoted. , 8 is a first end whose one end is pivotally supported on one end of the lever 7.
The link 9 is a power storage pin provided at the other end of the first link 8 and loosely inserted in the elongated hole 6.

Reference numeral 10 is a locking pin provided at the other end of the lever 7, 11 is a spring box, 12 is a second link provided at the center of the spring box 11, and 13 is a second link drawn from the spring box 11.
It is a long hole formed at one end of the link 12, and the locking pin 1
0 is inserted loosely. Reference numeral 14 is a storage plate that is connected to the other end of the second link 12 and is movably provided in the spring box 11.
Are a plurality of closing springs provided between the bottom plate of the spring box 11 and the energy storage plate 14.

Then, the rotation of the output shaft 1 by the motor is transmitted to the third gear 5 through the first gear 3, the drive shaft 2 and the second gear 4, and the right rotation of the third gear 5 causes play in the slot 6. The inserted energy-storing pin 8 moves to the left, the lever 7 rotates to the right when the first link 8 moves to the left, and the second link 12 moves to the right when the locking pin 10 moves to the right. Move and store plate 14
The closing spring 15 compresses and stores energy by the movement of, and the energy storage state is locked by the locking means (not shown) after energy storage.

By the way, in the case of the above-mentioned conventional apparatus, if any abnormality such as a breakage of the hoisting mechanism due to a stop of the motor power supply or a break of gear teeth occurs during hoisting of the closing spring 15 due to the rotation of the motor, the hoisting operation is performed. Closing spring 1 on the way
The force for locking the spring force of No. 5 is lost, the closing spring 15 is released, and the motor is forcibly rotated in the reverse direction through the gear train of the winding speed reduction mechanism, resulting in damage to the speed reduction mechanism, the motor, etc. There is.

On the other hand, an energy storage device which prevents damage to the hoisting mechanism, motor, etc. is disclosed in Japanese Patent Laid-Open No. 3-201328. In this device, the feed claw is swung by the motor to rotate the electric claw wheel by one tooth, and the position is retained by the reverse rotation prevention claw, which is repeated until the claw wheel is rotated and the spring is stored by this rotation. I am energetic. That is, the deceleration mechanism in the case of electric operation is configured to include the feed claw mechanism.

In the case of electric operation, the other feed pawl is swung by the manual handle, and the manual pawl wheel fixed to the same shaft as the electric pawl wheel is rotated by one tooth, and its position is set. Is retained by the reverse rotation preventing claw that engages with the electric claw wheel, and this is repeated to store the spring.

[0008]

In the case of the device described in the above publication, since the speed reducing mechanism in the electric spring winding is constituted by the feed pawl mechanism, the feed pawl, the biasing spring,
Since it is necessary to provide a swinging mechanism for the feed claws, etc., the number of parts is very large, and assembly is difficult. In addition, the load fluctuation during electric hoisting is large, durability is poor, and noise is large.

Further, the manual winding and the reverse rotation prevention require two ratchet wheels, an electric ratchet wheel and a manual ratchet wheel, which causes a problem that the mechanism becomes large and expensive.

In view of the above points, the present invention prevents the hoisting mechanism from reversing and prevents damage to the hoisting mechanism, the motor, and the like, even if any abnormality occurs during hoisting of the closing spring. It has a small number of parts, is easy to assemble, has less load fluctuation during electric hoisting, has excellent durability, and has low noise.
An object of the present invention is to provide a spring energy accumulating device for a switchgear, which is made into individual pieces, has a small size, and is inexpensive.

[0011]

In order to solve the above problems, the present invention is directed to a large first gear fixed to a drive shaft and meshed with an output shaft of a motor, and a small first gear fixed to the drive shaft. A spring accumulator for a switchgear, which includes a second gear and a large third gear meshing with the second gear, and stores a closing spring of the switchgear via a link, a lever, etc. by rotation of the third gear. In the device, a ratchet wheel concentrically fixed to the drive shaft and a biasing force toward the ratchet wheel by a spring to lock the ratchet wheel, and release in a direction opposite to the accumulating direction of the ratchet wheel. A fixed side pawl that prevents rotation in the direction, a movable plate whose base is rotatably supported by the drive shaft, and a movable plate that is supported by the movable plate and is urged toward the pawl wheel by a spring. Fixed to the movable plate and a movable side claw that is locked to the movable claw to prevent the claw wheel from rotating in the releasing direction. A drive rod, a return spring for urging the drive rod in a return direction opposite to the accumulating direction, a manual lever that reciprocally rotates about a support shaft as a fulcrum, and one end fixed to the base of the manual lever. Comes into contact with the drive rod, and the rotation of the manual lever causes the drive rod and the movable claw,
And a drive plate for rotating the drive shaft in the energy storage direction via the ratchet wheel.

[0012]

In the spring energy storage device for a switchgear according to the present invention constructed as described above, a large first gear fixed to the drive shaft meshes with the output shaft of the motor, and a small size fixed to the drive shaft. The second large gear meshes with the second large gear, the rotation of the third gear stores the closing spring of the opening / closing device via the link, lever, etc., and the claw fixed concentrically to the drive shaft. Since the fixed side pawl that prevents rotation in the releasing direction opposite to the energy storage direction is locked on the vehicle, even if the closing spring tries to release the force due to something unusual during winding, the fixed side pawl will The hoisting mechanism does not work in the opposite direction due to the lock on the ratchet wheel,
Damage to the motor etc. is prevented.

In addition, since the speed reduction mechanism for electric operation is composed of only the first, second and third gears, the structure is simple, the number of parts is small, and the assembly is easy. There is little change in load when winding, excellent durability, and low noise.

Further, the base of the movable plate is rotatably supported on the drive shaft, and the movable side pawl that prevents rotation of the ratchet wheel in the urging direction is supported on the movable plate, and the drive rod fixed to the movable plate is attached. ,
A return spring biases the return lever in the opposite direction to the accumulating direction, and one end abuts the drive rod on the base of the manual lever which reciprocally rotates about the support shaft as a fulcrum, and the drive lever is rotated by the rotation of the manual lever. Also, since the drive plate for rotating the drive shaft in the direction of energy storage is fixed via the movable side claw and the ratchet wheel, the closing spring can be stored by the manual lever, and a mechanism for manual winding and reverse rotation prevention is constructed. Since there is only one ratchet wheel, the mechanism is downsized and the cost is low.

[0015]

An embodiment will be described with reference to FIG.
In the figure, 16 is a ratchet wheel that is concentrically fixed to the first gear 3 integrally with the drive shaft 2 of FIG. 2, and 17 is a fixed plate, the base of which is loosely inserted into the drive shaft 2 and the end of which is a pin 18. It is fixed by. Reference numeral 19 denotes a fixed side claw supported by the fixed plate 17, 20
Is a spring for urging the claw 19 toward the ratchet wheel 16, 21 is a movable plate whose base is rotatably supported by the drive shaft 2, and 22 is a movable plate 2.
The movable side claw supported by 1 and 23 are springs for urging the claw 22 toward the claw wheel 16 side.

Reference numeral 24 is a drive rod which is pivotally supported by the drive shaft 2 and is integral with the movable plate 21, 25 is a return spring for urging the drive rod 24 in the clockwise direction, that is, the direction of arrow B in the figure, and 26 is one end of the movable plate 21. Numerals 27 and 27 are stoppers with which the rollers 26 come into contact, and regulate the return position of the movable plate 21. 28 is a manual lever that reciprocally rotates in the direction of the arrow C in the figure with the support shaft 29 as a fulcrum, 30 is a stopper that restricts the movement of the manual lever 28 in the right rotation direction, 31 is a drive plate fixed to the base of the manual lever 28, Reference numeral 32 denotes a roller provided at one end of the drive plate 31, which is brought into contact with the drive rod 24 to rotate the manual lever 28 counterclockwise to return the manual lever 28 to the return position.

The fixed side claw 19 and the movable side claw 22 are in contact with the ratchet wheel 16 by the springs 19 and 23, and when the drive shaft 2 rotates in the winding direction in the direction of arrow A in the figure, the rotation is blocked. However, when it rotates in the reverse direction, that is, in the direction of the arrow B, it is locked to the ratchet wheel 16 to prevent its rotation.

Next, when the closing spring 15 is charged by the motor, it is the same as in the case of FIG. 2, in which the ratchet wheel 16 rotates in the direction of arrow A, and the pawls 19 and 22 have no effect.
In the course of hoisting, if something unusual such as a stop of the motor power supply or damage to the hoisting mechanism occurs and the closing spring 15 tries to release the force, the ratchet wheel 16 tries to rotate in the direction of the arrow B in the reverse direction.
The pawls 19 and 22 are locked to the ratchet wheel 16 and the reverse rotation is blocked.

Next, when the lever 28 is rotated to the right from the state shown in FIG. And the movable side claw 22 moves the claw wheel 16 to A.
Rotate in the direction of the arrow. Next, when the manual force is released from the lever 28, the return spring 25 restores the state of FIG. 1, and the closing spring 15 is sufficiently charged by repeating the rotation of the lever 28.

[0020]

Since the present invention is configured as described above, it has the following effects. A large first gear 3 fixed to the drive shaft 2 meshes with the output shaft 1 of the motor, and a large third gear 5 meshes with a small second gear 4 fixed to the drive shaft 2, The rotation of the 3rd gear 5 causes the closing spring 15 of the opening / closing device via the links 8 and 12, the lever 7 and the like.
Wheel 1 that stores energy and is concentrically fixed to the drive shaft 2.
Since the fixed side claw 19 that blocks the rotation in the releasing direction opposite to the energy storing direction is locked to 6, even if the closing spring 15 tries to release the force due to some change in the winding process, The hoisting mechanism does not act in the reverse direction due to the pawl 19 being locked to the ratchet wheel 16, and damage to the hoisting mechanism, the motor, etc. can be prevented.

In addition, since the speed reducing mechanism for electric operation is composed of only the first, second, third gears 3, 4, and 5, the structure is simple and the number of parts is small, and the assembly is easy. It is easy, has less load fluctuation during electric hoisting, has excellent durability, and can reduce noise.

Further, the base of the movable plate 21 is rotatably supported on the drive shaft 2, and the movable side claw 22 for preventing the claw wheel 16 from rotating in the urging direction is supported on the movable plate 21.
The drive rod 24 fixed to the drive lever 24 is biased by a return spring 25 in a return direction opposite to the accumulating direction, and one end of the drive rod 24 is reciprocally rotated about a support shaft 29 as a fulcrum. 24, the drive plate 31 for rotating the drive shaft 2 in the energy storing direction via the drive rod 24, the movable side pawl 22, and the ratchet wheel 16 is fixed by the rotation of the manual lever 28. With this, the closing spring 15 can be charged, and the ratchet wheel 1 that constitutes a mechanism for manual winding and reverse rotation prevention is provided.
Since there is one 6, the mechanism can be downsized and the cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a partially cutaway front view of an embodiment of the present invention.

FIG. 2 is a cutaway front view of a conventional spring energy storage device.

[Explanation of symbols]

 1 Output Shaft 2 Drive Shaft 3 1st Gear 4 2nd Gear 5 3rd Gear 7 Lever 8, 12 Link 15 Closing Spring 16 Claw Wheel 19 Fixed Side Claw 20 Spring 21 Movable Plate 22 Movable Side Claw 23 Spring 24 Drive Rod 25 Return Spring 28 Manual lever

Claims (1)

(57) [Claims] 1. A drive shaft fixed to a motor output shaft.
Large combined first gear and small fixed to the drive shaft
Second gear and a large third gear meshed with the second gear, and a spring storage for a switchgear for storing a closing spring of the switchgear via a link, a lever, etc. by rotation of the third gear. In the biasing device, a ratchet wheel concentrically fixed to the drive shaft and a spring that is biased toward the ratchet wheel and locked to the ratchet wheel.
Then, rotation of the ratchet wheel in the releasing direction opposite to the accumulating direction
Fixed side claw to prevent the above, a movable plate whose base portion is rotatably supported by the drive shaft, and a movable plate supported by the movable plate, and a spring biases the claw wheel toward the claw wheel.
Is locked to the ratchet wheel, and the ratchet wheel rotates in the releasing direction.
The movable side pawl to prevent the movement, the drive rod fixed to the movable plate, and the drive rod attached to the return direction opposite to the accumulating direction.
A return spring that urges, a manual lever that reciprocates about a support shaft as a fulcrum, and is fixed to a base portion of the manual lever, one end of which is connected to the drive rod.
Abutment, and by rotating the manual lever, the drive rod and the front
The movable shaft and the ratchet wheel are used to move the drive shaft in the accumulating direction.
A spring energy storage device for a switchgear, which is provided with a drive plate for rotation .