JP2005317248A - Electromagnetic tripping device for breaker - Google Patents

Electromagnetic tripping device for breaker Download PDF

Info

Publication number
JP2005317248A
JP2005317248A JP2004131167A JP2004131167A JP2005317248A JP 2005317248 A JP2005317248 A JP 2005317248A JP 2004131167 A JP2004131167 A JP 2004131167A JP 2004131167 A JP2004131167 A JP 2004131167A JP 2005317248 A JP2005317248 A JP 2005317248A
Authority
JP
Japan
Prior art keywords
cylinder
yoke
movable iron
electromagnetic
circuit breaker
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2004131167A
Other languages
Japanese (ja)
Inventor
Hiroshi Fujioka
Koji Higake
Hitoshi Ito
Hajime Kitamura
仁志 伊藤
元 北村
浩二 樋掛
宏 藤岡
Original Assignee
Mitsubishi Electric Corp
三菱電機株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Electric Corp, 三菱電機株式会社 filed Critical Mitsubishi Electric Corp
Priority to JP2004131167A priority Critical patent/JP2005317248A/en
Publication of JP2005317248A publication Critical patent/JP2005317248A/en
Pending legal-status Critical Current

Links

Images

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electromagnetic tripping device for a breaker with high reliability without any conduction disorder of a contact caused by the deterioration of property due to the blunting of a damping spring or scatter of flux caused by overheat at soldering. <P>SOLUTION: The tripping device comprises: a cylinder 101 composed of a pipe 1 in which, dumping oil 4 is filled and a movable iron core 2 energized by the dumping spring 3 is inserted; an electromagnetic coil 9 wound on the outer periphery of the cylinder 101, pulling the movable iron core 2 against energizing force of the dumping spring when over current flows; and a yoke 6 having a hole part at one end part in which the cylinder 101 is inserted, energized in the direction separating from the cylinder 101 at normal time, having a movable iron piece 7, pulled toward the cylinder 101 when the over current flows through the electromagnetic coil 9 on the other end part. The cylinder 101 is fixed to the yoke 6 by being inserted into a hole part of the yoke 6 through a sheet-shaped soft material 11. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an electromagnetic trip device for a circuit breaker that interrupts an electric circuit when an overcurrent is detected.

FIG. 4 is a diagram illustrating a configuration of a conventional electromagnetic tripping device (an electromagnetic tripping device having a dashpot structure) for a circuit breaker disclosed in, for example, Patent Document 1 (Japanese Patent Publication No. 56-31696). The portion of the cylinder 101 shows a cross section.
4 is modified so that FIG. 2 of Patent Document 1 can be easily compared with the diagram showing the structure of the first embodiment of the present invention. It is the same as the figure.
In the figure, the pipe 1 is formed by deep drawing a non-magnetic metal plate such as a brass plate. A movable iron core 2 is inserted into the pipe 1, a braking spring 3 is fitted to one end of the movable iron core 2, and a braking oil 4 such as silicon oil is filled in the pipe 1. The lid 5 is made of a magnetic material and seals the pipe 1 by spot welding or soldering.
The pipe 1, the movable iron core 2, the braking spring 3, the braking oil 4 and the lid 5 constitute a known cylinder 101.

The yoke (a yoke) 6 has a cylinder 101 fixed to one end thereof by soldering. In the figure, reference numeral 102 denotes solder.
The movable iron piece 7 is pivotally supported by the other end of the yoke 6 so that one end of the movable iron piece 7 is sucked by the lid 5 of the cylinder 101. The other end of the movable iron piece 7 is formed to engage with a trip bar (not shown).
The control spring 8 is installed between the yoke 6 and the movable iron piece 7, and is urged in a direction in which the movable iron piece 7 is separated from the lid 5 of the cylinder 101.
The electromagnetic coil 9 is wound around the outer periphery of the cylinder 101. The insulating plate 10 is for protecting the electromagnetic coil 9.

Next, the time delay operation of the electromagnetic trip device will be described. That is, when an overcurrent flows through the electromagnetic coil 9, the electromagnetic force generated in the movable iron core 2 becomes larger than the pressing force of the brake spring 3, and the movable iron core 2 gradually moves in the direction of the lid 5.
When the movable iron core 2 approaches the lid 5 by this movement, the magnetic flux passing through the movable iron piece 7 increases rapidly, and one end of the movable iron piece 7 is attracted to the lid 5.
By this suction, a trip bar (not shown) engaged with the other end of the movable iron piece 7 is operated, and a known opening / closing mechanism is tripped.
As described above, the tripping operation is performed after the movable iron core 2 gradually moves and a predetermined time elapses. The time for the extension operation is mainly the viscosity and amount of the braking oil 4 and the pressing force of the braking spring 3. It is made to get by.
Japanese Patent Publication No.56-31696 (Fig. 2)

The conventional electromagnetic tripping device for a circuit breaker is configured as described above, but the spring constant of the brake spring 3 must be constant in order to make the time-delay operation characteristic constant.
However, when soldering the yoke 6 and the cylinder 101, a high-temperature soldering iron of about 400 ° C. is pressed against the cylinder 101, so that the spring spring dulls due to the thermal effect and the spring constant varies. There is.
In addition, when changing to lead-free soldering, the soldering temperature rises compared to the current tin-lead eutectic solder, spring blunting due to thermal effects (ie, blunting of spring force) increases, and spring constant variation Becomes larger.
In addition, the flux is used when soldering the yoke 6 and the cylinder 101, but when the flux or flux residue that is scattered around the soldering and falls off is dropped, it enters between the switching contacts inside the circuit breaker. May cause continuity failure.

  The present invention has been made to solve the above-described problems. In an electromagnetic tripping device for a circuit breaker used for a circuit breaker that interrupts an electric circuit when an overcurrent is detected, a cylinder is provided for a yoke. Highly reliable circuit breaker electromagnetic breaker with no deterioration in characteristics due to blunting of spring force of braking spring due to overheating during soldering, and no contact conduction failure due to flux scattering during soldering The purpose is to provide.

An electromagnetic trip device for a circuit breaker according to the present invention is an electromagnetic trip device for a circuit breaker used for a circuit breaker that breaks an electric circuit when an overcurrent is detected,
A cylinder in which a movable iron core biased by a brake spring is inserted into a pipe filled with brake oil, and a biasing force of the brake spring when an overcurrent flows around the outer periphery of the cylinder. An electromagnetic coil that attracts the movable iron core against the above and a hole into which the cylinder is inserted are formed at one end, and are normally urged in a direction away from the cylinder. A movable iron piece that is attracted in the direction of the cylinder when an overcurrent flows through the yoke,
The cylinder is fixed to the yoke by being press-fitted into the hole of the yoke via a sheet-like soft material.

According to the present invention, since the cylinder is press-fitted into the hole of the yoke via the soft material and the cylinder is fixed to the yoke 6, soldering work can be eliminated for fixing the cylinder and the yoke.
Therefore, the brake spring that urges the movable iron core does not cause spring dullness due to overheating during the soldering operation, so that it is possible to prevent deterioration of the characteristics of the circuit breaker as an electromagnetic trip device and to reduce the flux during soldering. It is possible to obtain a highly reliable circuit breaker electromagnetic trip device that is free from contact failure caused by scattering.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
Embodiment 1 FIG.
FIG. 1 is a diagram showing a configuration of an electromagnetic trip device for a circuit breaker according to Embodiment 1 of the present invention, and a cylinder portion shows a cross section.
In FIG. 1, a pipe 1 is formed by deep drawing a nonmagnetic metal plate such as a brass plate. A movable iron core 2 is inserted into the pipe 1, a braking spring 3 is fitted to one end of the movable iron core 2, and a braking oil 4 such as silicon oil is filled in the pipe 1.
The lid 5 is made of a magnetic material and seals the pipe 1 by spot welding or soldering.
The pipe 1, the movable iron core 2, the braking spring 3, the braking oil 4 and the lid 5 constitute a known cylinder 101.

In the above-described conventional apparatus, the yoke 101 is fixed to one end of the yoke 6 by soldering.
However, the electromagnetic tripping device for a circuit breaker according to the present embodiment has a hole formed in one end side of the yoke 6 with the soft material 11 interposed between the yoke 6 and the cylinder 101. The yoke 6 is characterized in that the cylinder 101 is fixed (fixed) by being press-fitted into the cylinder.
Specifically, with the lower end surface 6a of the yoke 6 fixed with a jig or the like, the cylinder 101 is pushed into the hole of the yoke 6 by pushing the head of the cylinder 101 (that is, the upper surface of the lid 5). Press-fit with the soft material 11 interposed.

The movable iron piece 7 is opposite to the other end of the yoke 6 (that is, the lower end surface side into which the cylinder 101 is press-fitted) so that one end thereof is attracted to the lid 5 of the cylinder 101 by the electromagnetic force generated by the electromagnetic coil 9. At the end). The other end of the movable iron piece 7 is formed to engage with a trip bar (not shown).
The control spring 8 is installed between the yoke 6 and the movable iron piece 7, and is urged in a direction in which the movable iron piece 7 is separated from the lid 5 of the cylinder 101.
The electromagnetic coil 9 is wound around the outer periphery of the cylinder 101. The insulating plate 10 protects the electromagnetic coil 9.

The material of the soft material 11 may be a material softer than the pipe material 1, for example, soft copper, tin, aluminum, solder, polyester, or the like.
Then, an X-shaped cut 11a is made in the soft material 11 as shown in FIG. 2, or a cut 11a is made in the hole 11b formed as shown in FIG.
Thereby, the soft material 11 is easily interposed between the cylinder 101 and the yoke 6.
Further, the lower end surface 6a of the yoke 6 is subjected to burring (burring), and the burring portion 6b is formed in the hole into which the cylinder 101 is press-fitted. Since the contact area with 1 increases, the inclination of the cylinder 101 decreases.
Therefore, the fixation (fixation) of the cylinder 101 to the yoke 6 is stable, and the time-delay operation characteristics are also stable.

Specifically, for example, the outer diameter of the pipe 1 (that is, the outer diameter of the cylinder 101) is 4.5 mm, the hole diameter of the yoke 6 is 4.6 mm, and the soft material 11 has a thickness of 0.1 mm. It is preferable to use a polyester film.
When a polyester film is used as the soft material 11, the thickness is 1.5 to 3 times the difference between the outer diameter of the pipe 1 and the hole diameter of the yoke 6 (in the above case, twice the thickness). ), The fixing strength could be sufficiently secured, and the deformation of the pipe 1 made of a relatively soft metal material such as brass (deformation when the cylinder 101 was press-fitted into the yoke 6) was not observed.

In the case of the above-described specific example, the difference between the outer diameter of the pipe 1 and the hole diameter of the yoke 6 is 0.1 mm, so the soft material 11 having twice the thickness is used.
Moreover, since the lower end surface 6a of the yoke 6 is made flat, positioning when the yoke 6 is press-fitted into the pipe 101 can be accurately and easily performed.
When the outer diameter of the pipe 1 is 4.5 mm, the hole diameter of the yoke 6 is 4.6 mm, and the thickness of the soft material 11 is 0.1 mm, the amount of the notch 11a shown in FIG. 7 mm, the axial length of the burring portion 6b shown in FIG. 1 is 2.0 mm.

In the above description, the case where one soft material 11 is used has been described, but a plurality of sheet-like soft materials may be used in an overlapping manner. However, as a matter of course, assembling is superior when one sheet is used.
Further, when a resin sheet is used as the soft material 11, it may be formed integrally with an insulating plate 10 that is also formed of an insulating resin. In this case, the number of parts can be reduced and the positioning accuracy of the electromagnetic coil 9 is improved. .

As described above, in the present embodiment, an electromagnetic trip device for a circuit breaker used for a circuit breaker that interrupts an electric circuit when an overcurrent is detected, and the pipe 1 filled with braking oil 4 is provided. Cylinder 101 in which the movable iron core 2 urged by the brake spring 3 is inserted, and wound around the outer periphery of the cylinder 101 and movable against the urging force of the brake spring 3 when an overcurrent flows. An electromagnetic coil 9 that attracts the iron core 2 and a hole into which the cylinder 101 is inserted are formed at one end, and is normally urged in a direction away from the cylinder 101, and an overcurrent is applied to the electromagnetic coil 9. A movable iron piece 7 sucked in the direction of the cylinder 101 when it flows is provided with a yoke 6 pivotally supported at the other end, and the cylinder 101 is inserted into the hole of the yoke 6 via a sheet-like soft material 11. It is fixed to the yoke 6 by press-fitting It is.
As a result, it is possible to prevent deterioration in characteristics due to blunting of the spring force of the braking spring due to overheating at the time of soldering, and contact conduction failure due to scattering of flux at the time of soldering.

Further, since the hole portion of the yoke 6 is burring processed, the contact area between the hole portion of the yoke 6 and the pipe 1 is increased, so that the inclination of the cylinder 101 is reduced, and the cylinder 101 with respect to the yoke 6 is reduced. Fixing (fixing) is stable, and time-delay operating characteristics are also stable.
In addition, since the sheet-like soft material 11 is formed with an X-shaped cut 11a at a substantially central portion, the soft material 11 is likely to be interposed between the cylinder 101 and the yoke 6.

  This invention is highly reliable and can prevent deterioration in characteristics due to blunting of the spring force of the braking spring due to overheating during soldering when fixing the cylinder to the yoke, and contact conduction failure caused by flux scattering during soldering This is useful for the realization of an electromagnetic trip device with a high degree of breaker.

It is a fragmentary sectional view which shows the structure of the electromagnetic tripping device of the circuit breaker by Embodiment 1. FIG. It is a figure for demonstrating the shape of the soft material used for the electromagnetic tripping device of the circuit breaker by Embodiment 1. FIG. It is a figure for demonstrating the other shape of the soft material used for the electromagnetic tripping device of the circuit breaker by Embodiment 1. FIG. It is a fragmentary sectional view which shows the structure of the conventional electromagnetic tripping device of a circuit breaker.

Explanation of symbols

1 Pipe 2 Movable Iron Core 3 Braking Spring 4 Braking Oil 5 Lid 6 Relay (Yoke)
6a Lower end surface 7 Movable iron piece 8 Control spring 9 Electromagnetic coil 10 Insulating plate 11 Soft material 11a Notch 11b Hole 101 Cylinder

Claims (4)

  1. An electromagnetic trip device for a circuit breaker used for a circuit breaker that breaks an electric circuit when an overcurrent is detected,
    A cylinder in which a movable iron core biased by a braking spring is inserted into a pipe filled with braking oil;
    An electromagnetic coil wound around the outer periphery of the cylinder and attracting the movable iron core against the biasing force of the brake spring when an overcurrent flows;
    A hole into which the cylinder is inserted is formed at one end, and is normally urged in a direction away from the cylinder. When an overcurrent flows through the electromagnetic coil, the hole is attracted in the direction of the cylinder. A movable iron piece is provided with a yoke pivotally supported at the other end,
    An electromagnetic trip device for a circuit breaker, wherein the cylinder is fixed to the yoke by being press-fitted into the hole of the yoke via a sheet-like soft material.
  2.   The electromagnetic tripping device for a circuit breaker according to claim 1, wherein the hole portion of the yoke is burring processed.
  3.   The electromagnetic tripping device for a circuit breaker according to claim 1 or 2, wherein the sheet-like soft material has an X-shaped notch formed in a substantially central portion.
  4.   The electromagnetic trip device for a circuit breaker according to claim 1 or 2, wherein the sheet-like soft material is any one of soft copper, tin, aluminum, solder, and polyester.
JP2004131167A 2004-04-27 2004-04-27 Electromagnetic tripping device for breaker Pending JP2005317248A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2004131167A JP2005317248A (en) 2004-04-27 2004-04-27 Electromagnetic tripping device for breaker

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2004131167A JP2005317248A (en) 2004-04-27 2004-04-27 Electromagnetic tripping device for breaker
CNB2004100685166A CN100336151C (en) 2004-04-27 2004-08-24 Electromagnetic tripping device for breaker

Publications (1)

Publication Number Publication Date
JP2005317248A true JP2005317248A (en) 2005-11-10

Family

ID=35346578

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2004131167A Pending JP2005317248A (en) 2004-04-27 2004-04-27 Electromagnetic tripping device for breaker

Country Status (2)

Country Link
JP (1) JP2005317248A (en)
CN (1) CN100336151C (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102133867A (en) * 2011-03-31 2011-07-27 韦良东 Circuit automatic protector against water seepage caused by automobile collision
CN107414236A (en) * 2017-07-25 2017-12-01 王建林 Low-voltage circuit breaker electromagnetic assembly is automatically welded system and welding method

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4921930B2 (en) * 2006-11-10 2012-04-25 河村電器産業株式会社 Circuit breaker
CN101882544A (en) * 2010-06-10 2010-11-10 厦门大恒科技有限公司 Air switch with functions of delayed releasing and automatic reclosing
US20140072838A1 (en) * 2011-05-02 2014-03-13 Toyota Jidosha Kabushiki Kaisha Fuel cell system
CN103187214B (en) * 2011-12-29 2015-06-17 上海良信电器股份有限公司 Electromagnetic trip system of hydraulic type disconnector

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69405926T2 (en) * 1993-07-06 1998-02-12 Circuit Breaker Ind Load switch mechanism

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102133867A (en) * 2011-03-31 2011-07-27 韦良东 Circuit automatic protector against water seepage caused by automobile collision
CN107414236A (en) * 2017-07-25 2017-12-01 王建林 Low-voltage circuit breaker electromagnetic assembly is automatically welded system and welding method
CN107414236B (en) * 2017-07-25 2019-07-16 乐清野岛机电有限公司 Low-voltage circuit breaker electromagnetic assembly is automatically welded system and welding method

Also Published As

Publication number Publication date
CN1691239A (en) 2005-11-02
CN100336151C (en) 2007-09-05

Similar Documents

Publication Publication Date Title
US20190148095A1 (en) Contact switching device and electromagnetic relay using same
US9412545B2 (en) Electromagnetic relay
EP2639804B1 (en) Sealed contact device
JP5163318B2 (en) Electromagnet device
US8159807B2 (en) Method and device for operating a switching device
US8274345B2 (en) Electromagnetic relay
TW517255B (en) Electrical switchgear apparatus comprising a vacuum cartridge and a flexible electrical connector
US6784773B2 (en) Electromagnetic relay
US7692522B2 (en) Method and device for the safe operation of a switching device
US8373523B2 (en) Electromagnetic trip device
JP4281846B1 (en) Cutting devices, breakers, contactors, and circuit breakers
JP2015046377A (en) Electromagnetic relay
DE69922291T2 (en) Actuator with calibration means and electrical circuit breaker equipped with these means
EP2899736B1 (en) Electromagnetic relay
JP4042784B2 (en) Contact device
KR101533002B1 (en) Electromagnetic relay
EP1879204B1 (en) Design and method for keeping electrical contacts closed during short circuits
JP2007305467A (en) Electromagnetic relay, its adjustment method, and adjustment system
US20100231347A1 (en) Triggering device for a thermal fuse
JP2007305468A (en) Electromagnetic relay
US9640355B2 (en) Contact apparatus
JP4765761B2 (en) Electromagnetic relay
EP2835813B1 (en) Contact mechanism and electromagnetic relay
EP1713104B1 (en) Electromagnetic relay
US6937123B2 (en) Electromagnetic switch of engine starter

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20061129

A977 Report on retrieval

Effective date: 20090423

Free format text: JAPANESE INTERMEDIATE CODE: A971007

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20090428

A02 Decision of refusal

Free format text: JAPANESE INTERMEDIATE CODE: A02

Effective date: 20091006