JPS6247153Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to an operating device for a shear cutter, and in particular, an operating device that can prevent over-storage of the closing spring in a cutter that cuts and throws the sheath by spring operation. Regarding.

When charging the closing spring of a breaker, the closing spring may be overloaded due to lack of mechanical dimensional accuracy or improper adjustment of electrical timing, resulting in various problems.

The present invention eliminates the above-mentioned drawbacks, and its purpose is to provide an operating device that can prevent overloading of the closing spring and enable high-performance closing operations.

DESCRIPTION OF THE PREFERRED EMBODIMENTS An operating device for a sheath cutter according to an embodiment of the present invention will be explained below with reference to FIGS. 1 to 6.

In each figure, 1 is a fixed contact 1a and a movable contact 1b.
2, a connecting link; 4, a driving force transmission lever pivotably supported by a pin 5; and 6, a lever 4 and a connecting link 3 are pivotally connected. The first link, 8 is a stopper,
9 is the second link, 10 is the first link 6 and the second link
11 is a roller connecting the links 9, 1
2 is a third link connected to the roller 11 and pin 13, and 14 is a link return spring. 15 is a tripping hook pivotally supported by a pin 16, 17 is a tripping hook return spring, 18 is a closing hook, 19 is a closing hook return spring, and 20 is a closing electromagnet.

21 is an operating shaft, and this operating shaft 21 has a closing lever 22, a closing cam 23, and a stop pawl wheel 24.
and a feed ratchet wheel 25 are integrally attached.

The stop pawl wheel 24 has a stop pawl 24a,
The feed pawl wheel 25 has a flat portion 25b corresponding to at least two pawl ridges on the outer peripheral edge of the feed pawl 25a. The feed pawl 25a is rotatably supported on an operation plate 26, and is engaged with the feed pawl wheel 25 by a spring 27. 28 is an operation link pivotally connected to the operation plate 26, 29 is a manual operation lever, and 30 and 31 are stopper pins. One end of a closing spring 32 is connected to the closing lever 22 .

Next, the operation of the operating device having the above configuration will be explained. FIG. 1 shows the closing state of the bow disconnector, in which the closing spring 32 is in a released state, and the bow cutting spring 2 is in an energized state. At this time, in the feed pawl wheel 25, the flat portion 25b is at a position rotated by 180 degrees with respect to the feed pawl 25a, and the input hook 18 and the input cam 22 are disengaged. In this state, when a shear disconnection command is issued and the engagement between the trip hook 15 and the roller 11 is released, the vacuum sheath breaker 1 is disconnected by the spring force of the sheath disconnection spring 2.

FIG. 2 shows the blade and disconnector in a disconnected state. In this condition, when the operating lever 29 is manually rotated as shown by the arrow, the operating plate 26 is rotated via the operating link 28. , the feed pawl 25a engages with the feed pawl wheel 25, and the feed pawl wheel 25 rotates counterclockwise in the figure. As a result, the stopper ratchet wheel 24, the closing cam 23, and the closing lever 22 also rotate, and when they have rotated 180 degrees, the loading of the closing spring 32 is completed. At this time, as shown in FIG. 3, the flat portion 25b of the feed pawl wheel 25 has come to a position where it engages with the feed pawl 25a. Also, roller 11 is the tripping hook 1.
5, and the input hook 18 and the input lever 2 are engaged with each other.
2 has been disengaged. Next, as shown in FIG. 3, when the stopper pin 30 is removed and the operating lever 29 is operated, the feed pawl 25a of the feed pawl wheel 25 engages with the flat portion 25b, and the making hook 18 is moved into the making lever 22. When engaged, the closing reset state as shown in FIG. 4 is established.

The stopper pin 30 is reattached in the closing reset state shown in FIG.
5a is engaged with the flat portion 25b, the feed pawl wheel 25 does not rotate.

Therefore, the closing spring 32 will not be overloaded, and the closing lever 22 and closing hook 1 will not be overloaded.
No unnecessary stress is applied between the 8 parts, and mechanical damage is prevented.

5 and 6 show the specific structure of the closing spring 32 portion. In FIGS. 5 and 6, 35 and 36 are spring receiving members, and a sliding rod 34 is slidably inserted into the spring receiving member 35. A sliding guide portion 36a extends from the spring receiving member 36, and the sliding rod 34 is similarly inserted into this sliding guide portion 36a. 37 is a pin for pivotally fixing the spring receiving member 36 to the fixing part 38, and 40 is a pin for locking the release of the sheath breakage spring 32 when slowly inserting the sheath cutter, as will be described later. It is a restraining metal fitting for keeping it.

In other words, the restraint fitting 40 holds the spring receiving member 3 when the closing spring 32 is loaded, as shown in FIG.
It is formed into a U-shape in order to fit between 5 and 36. Therefore, when the closing spring 32 is locked by the restraint fitting 40, the sliding rod 34 can freely slide against the spring receiving members 35, 36, and the slow closing of the cutter is made possible. It becomes possible.

The purpose of slow input of the breaker is to maintain and inspect the breaker. That is, in the spring closing device, when the closing spring is in the loaded state, the closing hook is tripped to close the closing hook. At this time, the closing spring is released rapidly, making it difficult to check whether there is any variation in contact between the three phases or to perform various inspections and adjustments.

According to the present invention, the operating lever 29 operates between the stopper pins 30 and 31, the feed pawl 25a rotates the feed pawl wheel 25 one tooth at a time, and the closing spring 32 is loaded.

When the closing spring 32 has completed charging, the restraining fitting 40 is fitted between the spring receiving members 35 and 36 as shown in FIGS. 5 and 6 to lock the closing spring 32, and then the closing spring 32 is moved to the state shown in FIG. 3. When the stopper pin 30 is removed and the operation lever 29 is operated greatly, the feed pawl 25a passes over the flat portion 25b of the feed pawl wheel 25 and engages with the next pawl. At the same time, if the engagement between the input hook 18 and the input lever 22 is released and the operation lever 29 is operated continuously, the feed ratchet wheel 25 will rotate while the input spring 32 is restrained, and the input cam 23 will rotate slowly. Slow insertion of the shiya disconnector is carried out.

Therefore, it becomes possible to check the dimensions between the fixed contact and the movable contact and perform various other inspections during the slow closing process.

As explained above, the present invention includes a closing lever to which one end of the closing spring is attached in a spring-operated disconnector, a closing cam that operates a link mechanism connected to a movable contact of the disconnector, and a closing cam that operates a link mechanism connected to a movable contact of the disconnector. A stopper wheel for regulating the rotational direction of the input lever and the input cam in one direction is integrally attached to the operation shaft, and a feed pawl wheel is attached to the operation shaft, and the feed pawl wheel has a length corresponding to at least two pawl widths. It is provided with a flat part, that is, a sliding claw part. Therefore, it is possible to prevent the closing spring from being overstressed and to prevent the generation of mechanically unreasonable stress, so that smooth operation is possible and a high performance disconnector operating device can be obtained.

[Brief explanation of the drawing]

The drawings relate to an operating device for a shield disconnector according to an embodiment of the present invention; FIG. 1 is a configuration diagram showing the disconnector in a closed state;
FIG. 4 is a block diagram for explaining the operation at the start of loading, FIG. 4 is a configuration diagram showing the closing reset state, FIG. 5 is a plan view of the closing spring portion, and FIG. 6 is a front sectional view of the closing spring portion. 1... Vacuum cutter, 2... Cutter spring, 3...
...Connection link, 4...Driving force transmission lever, 6...
1st link, 9...Second link, 10...Rolla, 11...Colo, 12...Third link, 1
5...Tripping hook, 15a...Tripping electromagnet,
18...Insertion hook, 20...Insertion electromagnet, 21
...Operation shaft, 22...Closing lever, 23...Closing cam, 24...Stop pawl wheel, 25...Feed pawl wheel, 25a...Feed pawl, 26...Operation plate, 28...
...Operation link, 29...Operation lever, 30, 31
...Stopperpin.

Claims (1)

[Scope of utility model registration request] A shear break spring is provided between the movable side of the sheath cutter and the link mechanism, and causes the sheath cutter to shred in response to a sheath cut command, and one end of the closing spring is eccentrically arranged. an attached loading lever; a loading cam that rotates in conjunction with the rotation of the loading lever and engages with the link mechanism; and a loading cam and the loading lever that are rotated in response to rotation of the feed claw; A feed pawl wheel that rotates the feed pawl, a stop pawl wheel that restricts the rotation of the feed pawl, the closing cam, and the closing lever only in the direction in which the closing spring is loaded, and an operating mechanism that rotates the feeding pawl. The operating device is characterized in that a flat portion having at least two pawl ridges is provided at a portion of the outer peripheral edge of the feed pawl wheel that engages with the feed pawl when the loading spring is completed. Sushiya disconnector operating device.