JP3147626B2 - Manual energy storage device of circuit breaker - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a manual energy storage device for an electric spring operated circuit breaker.

[0002]

2. Description of the Related Art FIG. 2 shows an example of an electric spring operating device used for a circuit breaker.
Is a small gear fixed to the output shaft of the speed reducer 2, and 4 is a large gear meshing with the small gear 3, which is fitted to the shaft 6 via a one-way clutch 5. 7, a closing cam fixed to one end of the shaft 6, a closing spring 8, a connecting rod 9 for connecting the closing cam 7 and the closing spring 8, and a pin 7a fitted to the shaft 11 and fixed to the closing cam 7. Is a main lever which is fitted on the shaft 13 and operated by the input cam 7.

FIG. 2 shows the charged state of the closing spring 8. When the closing hook 10 is rotated clockwise about the shaft 11 and disengaged from the pin 7 a, the releasing force of the closing spring 8 is released. As a result, the closing cam 7 is rapidly rotated clockwise, and the main lever 12 is rotated counterclockwise about the shaft 13 to close the circuit breaker (not shown) and to accumulate the breaking spring. At this time, the large gear 4 fitted to the shaft 6 via the one-way clutch 5 meshes with the small gear 3 and is stationary.

To energize the closing spring 8, the motor 1 is driven, and the large gear 4 is turned via the reduction gear 2 and the small gear 3. The large gear 4 rotates the shaft 6 clockwise through the one-way clutch 5 to compress and store the closing spring 8. When the connecting rod 9 exceeds the dead center, the closing spring 8 is released, and the closing cam 7 tries to turn rapidly in the clockwise direction. However, the pin 7a fixed to the closing cam 7 engages with the closing hook 10. Thus, the rotation is stopped, and the closing spring 8 is kept in the charged state.

In order to manually charge the closing spring for operation power loss, maintenance and the like, a manual handle is inserted and connected to the rotor shaft 1a projecting from the rear end of the motor 1 in FIG. Rotate with.

In FIG. 3 showing a conventional manual energy storage device,
14 is a mounting plate, 14a is an opening provided in the mounting plate 14, that is, a manual handle insertion hole, 15 is a manual handle, 15a is a handle shaft, 15b is a ratchet wheel provided on the handle shaft 15a, 16 is a reverse rotation prevention device , 16a is a claw axis,
16b is a spring for urging the pawl shaft 16a in the direction of the ratchet wheel 15b, and 16c is a collar for restricting the protrusion and rotation of the pawl shaft 16a. Reference numeral 17 denotes a shutter plate that rotates about a shaft 18, 17a denotes a knob for opening and closing the shutter plate 17,
Reference numerals 19 and 20 denote stoppers for closing and opening the shutter plate 17, and 21 denotes a stopper at one end and the shutter plate 17 at the other end.
Spring which is urged by the shutter to urge the shutter plate in the closing direction, 2
Reference numeral 2 denotes a limit switch, and reference numeral 23 denotes a nameplate for indicating a closing spring energizing operation direction.

To manually charge the closing spring, the knob 17a is depressed, the shutter plate 17 is rotated clockwise about the shaft 18 to open the opening 14a, and the handle shaft 15
a is inserted and penetrated. The tip of the hook shaft 16a is the hook wheel 15b
The front end of the handle shaft 15a is inserted into and connected to the rotor shaft 1a projecting from the rear end of the motor 1 so as not to hit the claw. At that time, the limit switch 22 that was pressed and operated by the shutter plate 17 returns to indicate that the shutter plate 17 is open, and also opens the drive power supply circuit of the motor 1 so that the motor 1 Block the drive.

The manual handle 15 is moved in the direction of the arrow on the
That is, when the counterclockwise rotation is performed, the closing spring 8 in FIG. 2 is charged, and the closing cam 7 which tries to rotate rapidly when the charging is completed and the connecting rod 9 passes through the dead center is moved to the closing hook 1.
The rotation is prevented by 0, the manual handle 15 does not rotate, and it is possible to know the completion of the energy accumulation. In the meantime, the reverse rotation preventing device 16 prevents the manual handle 15 from rotating in the reverse direction by engaging the teeth of the ratchet wheel 16b with the teeth of the ratchet shaft 16a and pushing out the springs 16b after the pawl shaft 16a is pushed by the teeth of the ratchet wheel 16b. Can work.

[0009]

[0005] Accidents such as loss of the operation power supply do not frequently occur, and the maintenance and inspection cycle has become very long because reliability has been improved due to improvement in the quality of circuit breakers. Therefore, the sliding motion of the claw shaft is hindered by the deterioration of dust or lubricating oil attached to the claw shaft of the reverse rotation prevention device, and the claw shaft pushed by the teeth of the ratchet wheel may not be pushed out by the spring force. . It is extremely dangerous if the reverse rotation of the manual handle that accumulates force against the release force of the closing spring is not reliably prevented, so check the operation of the reverse rotation prevention device prior to the manual energy accumulating operation. If the device does not perform a light sliding operation, it is necessary to disassemble, wash, and adjust the reverse rotation preventing device.

[0010] In addition, the manual handle may come off during the energy storage by rotating the manual handle, and the connection between the motor shaft and the handle shaft may be disconnected.

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and has no sliding parts, can reliably prevent the manual handle from reversing, and can prevent the manual handle from being pulled out. It is intended to provide equipment.

[0012]

Means for solving the above-mentioned problems in the present invention are an electric spring operating type shut-off system in which a shutter plate is provided in a manual handle insertion hole and a manual handle reverse prevention device is provided. In the manual energy storage device, a shutter plate meshing with teeth of a ratchet wheel provided on a manual handle shaft is provided, and a flange having an outer diameter larger than the maximum outer diameter of the ratchet wheel is provided. At one end.

[0013]

The shutter plate meshing with the teeth of the ratchet prevents the manual handle from reversing, and the flange provided at one end of the ratchet contacts the shutter plate to prevent the manual handle from being pulled out.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described with reference to an embodiment shown in the drawings.

FIG. 1 shows an embodiment of the present invention.
4 is a manual handle, 24a is a handle shaft, 24b is a ratchet provided on the handle shaft 24a, 25 is a handle shaft 24
Reference numeral a denotes a sleeve loosely fitted, reference numeral 26 denotes a flange fitted to one end of the ratchet wheel 24b, and reference numeral 27 denotes a retaining ring. 28 is axis 2
A shutter plate rotating about 9; 28a, a knob for opening and closing the shutter plate 28; 30 a spring receiving pin;
Reference numeral 31 denotes a spring, one end of which is hooked on the shutter plate 28 and the other end of which is hooked on a spring receiving pin 30 to bias the shutter plate 28 clockwise. 32 is a mounting plate, 32a is an insertion hole of the manual handle 24, 32b is a stopper window of the shutter plate 28, and regulates the open and closed positions of the shutter plate 28 together with the knob rod 28a. 33 is a limit switch, 34
Is a nameplate for indicating a closing spring energy storing operation direction.

FIG. 1 shows that the shutter plate 28 is rotated counterclockwise to open the manual handle insertion hole 32a.
, The handle shaft 24a is inserted into the rotor shaft 1a, and the distal end of the handle shaft 24a is inserted into the rotor shaft 1a protruding from the rear end of the motor 1 and connected to each other. An example in which the closing spring is charged when rotated clockwise as described above is shown.

Sleeve 25 loosely fitted to handle shaft 24a
The outer periphery of the manual handle 2 contacts the inner periphery of the insertion hole 32a.
4 can be smoothly rotated. When the manual handle 24 is rotated clockwise, the distal end of the shutter plate 28 is pushed up by the teeth of the ratchet wheel 24b, and thereafter meshes with the next tooth by the urging force of the spring 31 to prevent the manual handle 24 from rotating in reverse. Although the figure shows the case where the ratchet wheel 24b has four teeth, a ratchet wheel having more teeth can be used by changing the shape of the tip of the shutter plate 28.

A collar 26 provided at one end of the ratchet wheel 24b
Prevents the manual handle 24 from coming off when hitting the shutter plate 28. When inserting and removing the manual handle 24, the shutter plate 2
8 is opened until it does not touch the collar 27.

The limit switch 33 functions in exactly the same way as the limit switch 22 in FIG.

[0020]

The manual energy storage device according to the present invention is different from the prior art in that it has a claw shaft which is pushed in by teeth of a ratchet and meshes with teeth of the ratchet pushed out by a spring to prevent reverse rotation. There are no sliding parts that reciprocate, and the simple structure can reliably prevent the handwheel from reversing.
The flange provided at one end of the ratchet also prevents the manual handle from being pulled out, so that energy can be safely stored.

Further, since the shutter plate also serves as a reverse rotation preventing claw, the conventional reverse rotation preventing device becomes unnecessary, which contributes to a reduction in manufacturing cost.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing one embodiment of the present invention. (A) is a front view, (B) is a side view.

FIG. 2 is an explanatory diagram of a closing spring energy storage device.

FIG. 3 is an explanatory view of a conventional example. (A) is a front view, (B) is a plan view.

[Explanation of symbols]

 Reference numeral 24: manual handle 24a: manual handle shaft 24b: ratchet wheel 28: shutter plate 32a: manual handle insertion hole

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H01H 33/40 H01H 33/48 H01H 33/28 H01H 3/30

Claims (2)

(57) [Claims] 1. A manual power storage device for a circuit breaker of an electric spring operation type in which a shutter plate is provided in a manual handle insertion hole and a reverse rotation preventing device for a manual handle is provided. A manual energy storage device for a circuit breaker, characterized in that a shutter plate meshing with said teeth is provided. 2. A hook having an outer diameter larger than a maximum outer diameter of the ratchet wheel is provided at one end of the ratchet wheel.
The manual energy storage device as described in the above.