On-off mechanism of circuit breaker

Abstract

The utility model provides an on-off mechanism of a circuit breaker. The on-off mechanism comprises a spring, a fixed shaft I, an upper connecting rod, a movable iron core, a driving device and a fixed shaft II, the middle part of the movable iron core is rotationally mounted on the shell through a fixed shaft I, and the movable iron core can axially slide along the fixed shaft I; the spring sleeves the fixed shaft I, one end of the spring is connected with the shell, and the other end of the spring is connected with the upper end surface of the movable iron core; the upper end of the upper connecting rod is rotationally installed on the shell through a second fixing shaft. A wedge-shaped table is arranged at the lower end of the upper connecting rod; the wedge-shaped table can push the movable iron core to slide upwards in the first axial direction of the fixed shaft along with rotation of the upper connecting rod. The driving device is installed on the right side of the upper connecting rod, and the working end of the driving device and the upper connecting rod are located on the same plane. The handle is connected with the upper connecting rod through the U-shaped connecting rod; according to the utility model, opening and closing of the circuit breaker are realized through the single driving mechanism, and tripping and opening of the circuit breaker can be realized through the electromagnet when instantaneous current exceeding safety occurs in the circuit breaker.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of circuit breaker, and particularly relates to a circuit breaker on-off mechanism. BACKGROUND

[0002] The circuit breaker is a switch device capable of closing, carrying and opening the current under normal circuit conditions and capable of closing, carrying and opening the current under abnormal circuit conditions within a specified time. The circuit breaker is divided into a high-voltage circuit breaker and a low-voltage circuit breaker according to its use range, and the high-low voltage boundary is relatively vague, and generally, the above 3kV is called high-voltage electric appliance. The circuit breaker can be used to distribute electric energy, start the asynchronous motor infrequently, and protect the power supply line and motor, and when serious overloads or short circuits and under-voltage faults occur, the circuit can be automatically cut off, and the function is equivalent to the combination of the fuse-type switch and the over-voltage relay. Moreover, after breaking the fault current, generally, no parts need to be changed. The circuit breaker has been widely used. In the generation, transmission and use of electricity, power distribution is an extremely important link. The power distribution system includes a transformer and various high-low voltage electric appliances, and the low-voltage circuit breaker is a kind of electric appliance with large use quantity and wide range. At present, most of the circuit breakers are still closed and opened by pure mechanical structure, and because the low-voltage electric appliance field is developing in the direction of intelligence, such as smart home and 5G communication, the intelligent micro circuit breaker in the current power distribution industry needs to be improved in reliability in the aspect of intelligent control, and at present, there is a lack of a circuit breaker suitable for the intelligent power distribution industry. CONTENT OF THE UTILITY MODEL

[0003] In view of the above problems, the utility model aims at providing a circuit breaker on-off mechanism with an electromagnet drive.

[0004] The utility model is realized through the following technical schemes:

[0005] The utility model discloses a kind of on-off mechanisms of circuit breaker, including the shell of circuit breaker;The shell is mounted with the closing mechanism of circuit breaker, tripping mechanism and reset mechanism (all are prior art above-mentioned);A kind of on-off mechanism of circuit breaker also includes spring, fixed shaft one, upper connecting rod, moving iron core, driving device and fixed shaft two;The middle part of the moving iron core is rotatably installed on the shell by fixed shaft one, and moving iron core can slide along the axis of fixed shaft one;The spring is sleeved on fixed shaft one, and one end of spring is connected with shell, and the other end is connected with the upper end surface of moving iron core;The upper end of the upper connecting rod is rotatably installed on the shell by fixed shaft two;The lower end of the upper connecting rod is provided with wedge-shaped platform, and the lower surface of moving iron core is provided with matching inclined surface of wedge-shaped platform;The wedge-shaped platform can push moving iron core to slide along the axis of fixed shaft one with the rotation of upper connecting rod;The driving device is installed on the right side of upper connecting rod, and the working end of driving device is located in the same plane with upper connecting rod;The on-off mechanism also includes handle and U-shaped connecting rod;The handle is connected with upper connecting rod by U-shaped connecting rod, for the opening and closing of circuit breaker;The lower end of the upper connecting rod is connected with the closing mechanism of circuit breaker;The lower end of the moving iron core is connected with the tripping mechanism of circuit breaker;The on-off mechanism of circuit breaker also includes magnetic yoke;The magnetic yoke is installed on the right side of shell at the lower end of moving iron core, for making moving iron core rotate when electromagnetic force becomes larger;The spring is compression spring or torsion spring;The driving device is electromagnet or linear motor.

[0006] The utility model discloses a beneficial effect:

[0007] The utility model discloses through single drive mechanism to make circuit breaker realize opening and closing, and when the instantaneous current of circuit breaker exceeds safety, electromagnet can realize circuit breaker tripping opening. BRIEF DESCRIPTION OF DRAWINGS

[0008] The utility model makes further detailed explanation in combination with the drawings.

[0009] Figure 1 It is the structure schematic diagram of on-off mechanism in the utility model.

[0010] Figure 2 It is the structure schematic diagram of on-off mechanism in the utility model.

[0011] Figure 3 It is the structure schematic diagram of on-off mechanism in the utility model.

[0012] Figure 4 It is the structure schematic diagram of the upper connecting rod in the utility model.

[0013] As shown in the figure: 1-spring;2-fixed shaft one;3-upper connecting rod;31-wedge-shaped platform;4-moving iron core;5-driving device;6-fixed shaft two;7-handle;71-U-shaped connecting rod;8-shell;9-magnetic yoke;10-reset spring;11-reset rod. Detailed Implementation

[0014] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0015] It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and to facilitate understanding. They are not intended to limit the scope of this invention and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, provided they do not affect the effectiveness or purpose of this invention, should still fall within the scope of the technical content disclosed herein. Furthermore, terms such as "upper," "lower," "left," "right," and "middle" used in this specification are merely for clarity and not intended to limit the scope of this invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this invention.

[0016] In the description of this utility model, it should be noted that, unless otherwise expressly specified and limited, the terms "connected" or "linked" should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral connection; it can refer to a mechanical connection or an electrical connection; it can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. It should be noted that the terms "comprising," "including," or any other variations are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

[0017] like Figures 1-4 The circuit breaker's switching mechanism includes: a spring 1, a fixed shaft 1 2, an upper connecting rod 3, a wedge-shaped platform 31, a moving iron core 4, a drive device 5, a fixed shaft 2 6, a handle 7, a U-shaped connecting rod 71, a housing 8, a magnetic yoke 9, a closing mechanism, a tripping mechanism, and a reset mechanism.

[0018] The shell 8 of the circuit breaker is a conventional circuit breaker shell, and the shell 8 is provided with a conventional closing mechanism, a tripping mechanism and a reset mechanism of the circuit breaker; the reset mechanism comprises a reset spring 10 and a reset rod 11, the reset spring 10 is arranged on the upper connecting rod 3, and the reset spring 10 is used for providing elastic force for reset; the reset rod 11 cooperates with the upper connecting rod 3, and after the moving contact of the circuit breaker drives the trip catch to trip, the reset is realized by using the operating mechanism under the action of the reset spring 10 and the reset rod 11, and the principle is the same as that of the patent with the patent number ZL202322214500.2, and is prior art.

[0019] The handle 7 is slidably arranged in the shell 8, and the handle 7 is connected with the upper connecting rod 3 through a U-shaped connecting rod 71 and is used for opening and closing the circuit breaker.

[0020] The middle part of the moving iron core 4 is rotatably arranged on the shell 8 through a fixed shaft one 2, and the moving iron core 4 can slide along the fixed shaft one 2 in the axial direction; and the lower end of the moving iron core 4 is connected with the tripping mechanism of the circuit breaker.

[0021] The spring 1 is sleeved on the fixed shaft one 2, one end of the spring 1 is connected with the shell 8, and the other end is connected with the upper end surface of the moving iron core 4; the spring 1 is a compression spring or a torsion spring, and the spring 1 cooperates with the moving iron core 4 and provides the moving iron core 4 with an axial pressure and a rotating torque.

[0022] The upper end of the upper connecting rod 3 is rotatably arranged on the shell 8 through a fixed shaft two 6; the lower end of the upper connecting rod 3 is provided with a wedge-shaped table 31, and the lower surface of the moving iron core 4 is provided with a slope matched with the wedge-shaped table 31; the wedge-shaped table 31 can push the moving iron core 4 to slide in the axial direction along the fixed shaft one 2 along with the rotation of the upper connecting rod 3; the lower end of the upper connecting rod 3 is connected with the closing mechanism of the circuit breaker; the wedge-shaped table 31 is not limited to be a ladder table with a slope, and can also be an electromagnet or a linear motor to make the moving iron core 4 reach the upper limit position and the lower limit position.

[0023] The driving device 5 is arranged on the right side of the upper connecting rod 3, and the working end of the driving device 5 is located in the same plane as the upper connecting rod 3; the driving device 5 is an electromagnet or a linear motor.

[0024] The magnetic yoke 9 is arranged on the shell 1 on the right side of the lower end of the moving iron core 4, and is used for making the moving iron core 4 rotate when the electromagnetic force becomes large.

[0025] The working principle of the utility model is as follows:

[0026] When the circuit breaker is in the breaking state, the wedge block 31 on the upper connecting rod 3 is below the moving iron core 4, the moving iron core 4 is pushed upward, the driving end of the driving mechanism 5 is staggered forward and backward, then the driving mechanism 5 is controlled to move leftward, the moving iron core 4 is staggered, and the connecting rod 3 is contacted with the connecting rod 3, the connecting rod 3 rotates clockwise around the fixed shaft 6, thereby driving the closing mechanism to realize the closing action, and then the driving mechanism 5 is reset; after the driving mechanism 5 is reset, the moving iron core 4 is axially slid downward under the pressure of the spring 1, at this time, the moving iron core 4 and the driving end of the driving mechanism 5 are in the same plane, the driving mechanism 5 is controlled to move leftward and is contacted with the moving iron core 4, the moving iron core 4 rotates counterclockwise around the fixed shaft 2, thereby driving the tripping mechanism to complete the breaking action.

[0027] When the circuit breaker is in the closing state, the circuit is short-circuited (abnormal), the magnetic force of the magnetic yoke 9 on the moving iron core 4 sharply rises, when the magnetic force is greater than the torsional force value of the spring 1, the lower end of the moving iron core 4 is attracted to the magnetic yoke 9 and is close to the magnetic yoke 9, and then the moving iron core 4 rotates counterclockwise around the fixed shaft 2, thereby making the circuit breaker tripping mechanism unlock and trip, and completing the tripping breaking action.

[0028] The protection scope of the utility model is not limited to the technical scheme disclosed by the specific embodiment, any modification, equivalent replacement, improvement and the like made according to the technical essence of the utility model to the above embodiment all fall into the protection scope of the utility model.

Claims

1. A switching mechanism of a circuit breaker, comprising a housing (8) of the circuit breaker; the housing (8) is mounted with a closing mechanism, a tripping mechanism and a reset mechanism of the circuit breaker; characterized in that :It also includes spring (1), fixed shaft one (2), upper connecting rod (3), moving iron core (4), drive device (5) and fixed shaft two (6); the moving iron core (4) is rotatably installed on the housing (8) through the fixed shaft one (2), and the moving iron core (4) can slide along the fixed shaft one (2) axially; the spring (1) is sleeved on the fixed shaft one (2), one end of the spring (1) is connected with the housing (8), and the other end is connected with the upper end surface of the moving iron core (4); the upper end of the upper connecting rod (3) is rotatably installed on the housing (8) through the fixed shaft two (6); the lower end of the upper connecting rod (3) is provided with a wedge-shaped table (31), and the lower surface of the moving iron core (4) is provided with a slope matched with the wedge-shaped table (31); the wedge-shaped table (31) can push the moving iron core (4) to slide axially along the fixed shaft one (2) with the rotation of the upper connecting rod (3); the drive device (5) is installed on the right side of the upper connecting rod (3), and the working end of the drive device (5) is located on the same plane with the upper connecting rod (3); the lower end of the upper connecting rod (3) is connected with the closing mechanism of the circuit breaker; the lower end of the moving iron core (4) is connected with the trip mechanism of the circuit breaker.

2. An opening and closing mechanism of a circuit breaker according to claim 1, characterized in that :It also includes a magnetic yoke (9); the magnetic yoke (9) is installed on the right side of the lower end of the moving iron core (4) on the housing (1), for making the moving iron core (4) rotate when the electromagnetic force becomes larger.

3. An opening and closing mechanism of a circuit breaker according to claim 1, characterized in that : The spring (1) is a compression spring or a torsion spring.

4. An on-off mechanism for a circuit breaker according to claim 1, characterized in that : The drive device (5) is an electromagnet or a linear motor.

5. An on-off mechanism for a circuit breaker according to claim 1, characterized in that :It also includes a handle (7) and a U-shaped connecting rod (71); the handle (7) is slidably installed in the housing (8); the handle (7) is connected with the upper connecting rod (3) through the U-shaped connecting rod (71), for opening and closing the circuit breaker.

Images