CN217655836U

CN217655836U - Electromagnetic device for circuit breaker

Info

Publication number: CN217655836U
Application number: CN202220512269.8U
Authority: CN
Inventors: 叶晓丽; 赵瑞峰
Original assignee: Shanghai Renmin Electrical Apparatus Works Co Ltd
Current assignee: Shanghai Renmin Electrical Apparatus Works Co Ltd
Priority date: 2022-03-10
Filing date: 2022-03-10
Publication date: 2022-10-25
Anticipated expiration: 2032-03-10

Abstract

The utility model relates to an electromagnetic device for a circuit breaker, which comprises a first traction rod (1), a second traction rod (2), an electromagnet (3), a push rod (4), a pull rod (5) and a rotating shaft (6); the push rod (301) of the electromagnet (3) is abutted to the first traction rod (1), the second traction rod (2) and the push rod (4) are all rotatably arranged on the rotating shaft (6), the push rod (4) is fixed with the first traction rod (1), when the push rod (4) moves to a certain position, the second traction rod (2) is driven to move together, and the pull rod (5) is connected with the first traction rod (1). Compared with the prior art, the utility model discloses second traction lever and pull rod both can the synchronization action, can satisfy the inconsistent requirement of action stroke again, can promote alarm switch respectively and send alarm signal and drive the circuit breaker dropout.

Description

Electromagnetic device for circuit breaker

Technical Field

The utility model relates to a low-voltage apparatus technical field, concretely relates to an electromagnetic device for circuit breaker.

Background

The molded case circuit breaker is a common circuit protection device, when the molded case circuit breaker is connected into a protected circuit, current same as load flows, when short circuit or overload fault occurs to the load, the current flows through an electromagnetic coil inside an electromagnetic device, a magnetic field generated by the electromagnetic coil attracts an armature to instantaneously act through an iron core, and a tripping mechanism is driven to trip, so that the protection effect is achieved. However, in the prior art, most of electromagnetic devices of the circuit breakers only have one push rod for tripping the circuit breaker, and the triggering of the alarm switch needs to be realized by other devices, so that the structure space of the molded case circuit breaker is limited, one more device occupies the space, and the installation difficulty is increased.

SUMMERY OF THE UTILITY MODEL

The object of the present invention is to provide an electromagnetic device for a circuit breaker, which overcomes the drawbacks of the prior art.

The purpose of the utility model can be realized through the following technical scheme: an electromagnetic device for a circuit breaker comprises a first draw bar, a second draw bar, an electromagnet, a push rod, a draw bar and a rotating shaft;

the thimble of the electromagnet is abutted to the first traction rod, the second traction rod and the push rod are rotatably arranged on the rotating shaft, the push rod is fixed with the first traction rod, when the push rod moves to a certain position, the second traction rod is driven to move together, and the pull rod is connected with the first traction rod.

The utility model discloses in, electromagnetic means can trigger circuit breaker and alarm switch action in step, and the pull rod can drive circuit breaker operating device's traction lever action under the effect of first traction lever, makes the circuit breaker dropout, and the second traction lever can push alarm switch under the effect of push rod for after the circuit breaker dropout, send alarm signal. The pull rod and the second traction rod can act synchronously and meet the requirement of inconsistent action strokes.

Preferably, the electromagnet is arranged in a cavity of the support, a first round hole for installing a rotating shaft is formed in the support, and a push rod is arranged between the first traction rod and the support.

Further preferably, the first traction rod is provided with a small cylindrical surface, the ejector rod is provided with a first arc surface, and the first arc surface and the small cylindrical surface are attached to be installed, so that the ejector rod rotates on the small cylindrical surface.

Still further preferably, the top rod is provided with a rod, the rod is sleeved with a first spring, and the rod is arranged in the trapezoidal hole of the support, so that the top rod can only move in the trapezoidal hole.

Further preferably, the pull rod is provided with a sliding sheet, and the sliding sheet is installed in a groove of the support, so that the pull rod slides in the groove.

Preferably, the first traction rod is provided with a small cylinder, a cylindrical hole and a second arc surface;

the small cylinder is sleeved on the waist circular hole of the pull rod to drive the pull rod to move; the cylindrical hole is sleeved on the rotating shaft; the second arc surface is propped against by a thimble on the electromagnet.

Preferably, the first draw bar is provided with a first boss, the push rod is provided with a second boss, and the first boss is connected with the second boss through a second spring.

Preferably, the push rod is provided with a first pushed surface for resetting the push rod and a third boss for pushing the second traction rod.

Preferably, the pull rod is provided with a limiting surface for limiting and a pulling surface for pulling a pull rod of the circuit breaker operating mechanism.

Preferably, the second traction rod is provided with a pushing surface for pushing the alarm switch, a second round hole for being sleeved on the rotating shaft and a second pushed surface for driving the second traction rod to rotate under the pushing of the push rod.

Compared with the prior art, the utility model has the advantages of it is following:

1. the utility model discloses a first traction lever, second traction lever, electro-magnet, push rod, pull rod and axis of rotation's cooperation design can make second traction lever and pull rod both can the synchronization action, can satisfy the inconsistent requirement of action stroke again, makes second traction lever and pull rod promote alarm switch respectively and send alarm signal and drive the circuit breaker dropout, need not other devices to realize the touching of alarm switch, reduces the occupation of space, reduces the installation degree of difficulty;

2. the utility model changes the direction of the spring force action by the matching design of the small cylindrical surface on the first traction rod, the ejector rod, the spring and the trapezoidal hole on the support and utilizing the principle of passing dead points, thereby facilitating the reset of the device;

3. the utility model has the advantages that the matching design of the upper groove of the support and the upper sliding sheet of the pull rod ensures that the pull rod slides in the groove, thereby preventing the pull rod from deviating in the motion process and improving the reliability of the device;

4. the utility model discloses a cooperation setting of first boss, second boss and second spring for first traction lever and push rod both are fixed together, keep certain elasticity surplus simultaneously, have buffering effect.

Drawings

Fig. 1 is a schematic structural diagram of the electromagnetic device of the present invention;

fig. 2 is a side view of the electromagnetic device of the present invention;

FIG. 3 is an exploded view of the electromagnetic device of the present invention;

fig. 4 is a schematic structural view of the first traction rod and the push rod of the present invention;

FIG. 5 is a schematic structural view of the ejector rod of the present invention;

fig. 6 is a schematic view of the installation of the electromagnetic device of the present invention;

in the figure: 1-a first traction rod, 101-a small cylindrical surface, 102-a small cylinder, 103-a cylindrical hole, 104-a second circular arc surface, 105-a first boss, 2-a second traction rod, 201-a pushing surface, 202-a second round hole, 203-a second pushed surface, 3-an electromagnet, 301-an ejector pin, 4-a push rod, 401-a second boss, 402-a first pushed surface, 403-a third boss, 5-a pull rod, 501-a sliding sheet, 502-a waist round hole, 503-a limiting surface, 504-a pulling surface, 6-a rotating shaft, 7-a support, 701-a cavity, 702-a first round hole, 703-a trapezoidal hole, 704-a groove, 8-a push rod, 801-a first circular arc surface, 802-a rod, 9-a first spring, 10-a second spring, 11-a circuit breaker operating mechanism, 1101-a traction rod, 1101-a rocker arm, and 12-an alarm switch.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. The following examples are carried out on the premise of the technical solution of the present invention, and detailed embodiments and specific operation procedures are given, but the scope of the present invention is not limited to the following examples.

Example 1

The utility model provides an electromagnetic means for moulded case circuit breaker, includes first traction lever 1, second traction lever 2, electro-magnet 3, push rod 4, pull rod 5 and axis of rotation 6, and first traction lever 1, second traction lever 2 and push rod 4 all rotate and set up on axis of rotation 6, and push rod 4 is together fixed with first traction lever 1. The second traction rod 2 is used for pushing the alarm switch 12, when the push rod 4 moves to a certain position, the second traction rod 2 is driven to move together, the alarm switch 12 can be pushed, when the push rod 4 moves to a certain position in a reverse direction, the second traction rod 2 can stop moving, and the push rod 4 can continue to move forwards. The pull rod 5 is connected with the first pull rod 1 and is used for pulling the pull rod 1101 of the circuit breaker operating mechanism 11 to enable the circuit breaker to be tripped.

The electromagnetic device of the embodiment is arranged by matching the second traction rod 2 and the pull rod 5, one of the electromagnetic devices enables the alarm switch 12 to send out an alarm signal, and the other one enables the circuit breaker to be tripped, so that the electromagnetic device of the embodiment can synchronously trigger the circuit breaker and the alarm switch to act.

Example 2

An electromagnetic apparatus for a molded case circuit breaker, as shown in fig. 1 to 3, mainly includes: electro-magnet 3, support 7, pull rod 5, push rod 4, axis of rotation 6 etc. specifically:

the push rod 4, the first traction rod 1 and the second traction rod 2 are sleeved on the rotating

shaft

6, 3 parts can rotate together, wherein the push rod 4 and the first traction rod 1 are fixed together, and the push rod 4 can drive the second traction rod 2 to move together when moving to a certain position; when the push rod 4 moves reversely to a certain position, the second traction rod 2 can stop moving, and the push rod 4 can continue to move forwards.

As shown in fig. 4, the first traction rod 1 is provided with a small cylindrical surface 101, a small cylindrical surface 102, a first boss 105, a cylindrical hole 103, and a second circular arc surface 104: the small cylindrical surface 101 is attached to the first arc surface 801 of the ejector rod 8; the small cylinder 102 is sleeved on the waist circular hole 502 of the pull rod 5 and can drive the pull rod 5 to move; the first boss 105 is used for mounting the second spring 10; the cylindrical hole 103 is sleeved on the rotating shaft 6; the second arc surface 104 is pressed against by the thimble 301 of the electromagnet 3.

As shown in fig. 3, the second traction rod 2 is provided with a push surface 201, a second round hole 202, and a second pushed surface 203: the pushing surface 201 is used for pushing the alarm switch 12 (fig. 6); the second round hole 202 is sleeved on the rotating shaft 6; the second pushed surface 203 is pushed by the third boss 403 on the push rod 4, so that the second traction rod 2 rotates.

As shown in fig. 3 to 4, the push rod 4 is provided with a first pushed surface 402, a second boss 401, and a third boss 403: the first pushed surface 402 may be pushed by a rocker arm 1102 (fig. 6) of the circuit breaker operating mechanism 11, which may reset the push rod 4; the second boss 401 is used for installing a second spring 10, so that the push rod 4 and the first traction rod 1 are fixed together and can rotate together; the third boss 403 is used for pushing the second pushed surface 203 on the second traction rod 2.

As shown in fig. 3, the pull rod 5 is provided with a waist circular hole 502, a sliding sheet 501, a limiting surface 503 and a pulling surface 504: the waist round hole 502 is sleeved on the small cylinder 102 of the first traction rod 1, so that the small cylinder 102 moves in the waist round hole 502 and pulls the pull rod 5 to move; the sliding sheet 501 is arranged in a groove 704 of the support 7, so that the pull rod 5 slides in the groove 704; the limiting surface 503 is used for limiting; the pulling face 504 may pull on a pull bar 1101 (fig. 6) of the circuit breaker operating mechanism 11 to trip the circuit breaker.

As shown in fig. 5, the top rod 8 is provided with a first arc surface 801 and a rod 802: the first arc surface 801 is attached to the small cylindrical surface 101 of the first traction rod 1, so that the ejector rod 8 can rotate on the small cylindrical surface 101; the rod 802 is used for sleeving the first spring 9 and is arranged in the trapezoidal hole 703 of the support 7, so that the ejector rod 8 can only move in the trapezoidal hole 703.

As shown in fig. 3, the support 7 is provided with a trapezoidal hole 703, a groove 704, a cavity 701, and a first circular hole 702: the trapezoidal hole 703 is used for sleeving the rod 802 of the ejector rod 8 to limit the movement range of the rod 802; the groove 704 is used for installing the pull rod 5 and limiting the pull rod 5 to only slide in the groove; the cavity 701 is used for accommodating the electromagnet 3; the first circular hole 702 is used for mounting the rotating shaft 6.

In the present application, it should be noted that the terms "first", "second" and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should understand that all the improvements and modifications made without departing from the scope of the present invention according to the disclosure of the present invention should be within the protection scope of the present invention.

Claims

1. An electromagnetic device for a circuit breaker is characterized by comprising a first draw bar (1), a second draw bar (2), an electromagnet (3), a push rod (4), a draw bar (5) and a rotating shaft (6);

the push rod (301) of the electromagnet (3) is abutted to the first traction rod (1), the second traction rod (2) and the push rod (4) are all rotatably arranged on the rotating shaft (6), the push rod (4) is fixed with the first traction rod (1), when the push rod (4) moves to a certain position, the second traction rod (2) is driven to move together, and the pull rod (5) is connected with the first traction rod (1).

2. The electromagnetic device for the circuit breaker according to claim 1, characterized in that the electromagnet (3) is arranged in a cavity (701) of the support (7), the support (7) is provided with a first round hole (702) for installing the rotating shaft (6), and a push rod (8) is arranged between the first traction rod (1) and the support (7).

3. The electromagnetic device for the circuit breaker according to claim 2, characterized in that the first draw bar (1) is provided with a small cylindrical surface (101), the push rod (8) is provided with a first arc surface (801), and the first arc surface (801) is attached to the small cylindrical surface (101) so that the push rod (8) can rotate on the small cylindrical surface (101).

4. An electromagnetic device for a circuit breaker according to claim 3, characterized in that the top bar (8) is provided with a rod (802), the rod (802) is sleeved with a first spring (9), and the rod (802) is installed in the trapezoidal hole (703) of the support (7) so that the top bar (8) can only move in the trapezoidal hole (703).

5. The electromagnetic device for circuit breaker according to claim 2, characterized in that said tie rod (5) is provided with a sliding piece (501), said sliding piece (501) being mounted in a groove (704) of said support (7) so that said tie rod (5) slides in said groove (704).

6. The electromagnetic device for circuit breaker according to claim 1, characterized in that said first traction rod (1) is provided with a small cylinder (102), a cylindrical hole (103) and a second circular arc surface (104);

the small cylinder (102) is sleeved on a waist circular hole (502) of the pull rod (5) to drive the pull rod (5) to move; the cylindrical hole (103) is sleeved on the rotating shaft (6); the second arc surface (104) is propped against by a thimble (301) on the electromagnet (3).

7. The electromagnetic device for the circuit breaker according to claim 1, characterized in that the first draw bar (1) is provided with a first boss (105), the push rod (4) is provided with a second boss (401), and the first boss (105) and the second boss (401) are connected through a second spring (10).

8. The electromagnetic device for circuit breaker according to claim 1, characterized in that said push rod (4) is provided with a first pushed surface (402) for resetting the push rod (4) and a third boss (403) for pushing the second pull rod (2).

9. The electromagnetic device for circuit breaker according to claim 1, characterized in that said tie rod (5) is provided with a limit surface (503) for limiting and a pulling surface (504) for pulling the pulling rod (1101) of the circuit breaker operating mechanism (11).

10. The electromagnetic device for the circuit breaker according to any one of claims 1 to 9, wherein the second traction rod (2) is provided with a pushing surface (201) for pushing the alarm switch (12), a second round hole (202) for sleeving the rotating shaft (6), and a second pushed surface (203) for driving the second traction rod to rotate under the pushing of the push rod (4).