CN218101142U - Reclosing mechanism of circuit breaker - Google Patents

Abstract

The utility model relates to a reclosing mechanism of a circuit breaker, which comprises: a guide rail assembly arranged on the operation panel of the circuit breaker, a slide block slidably arranged on the guide rail assembly, and a crank arranged on the operation panel of the circuit breaker The drive assembly and the block assembly arranged on the slider; the slider is provided with a horizontal elongated hole corresponding to the crank of the crank drive assembly, and the crank is slidably arranged in the elongated hole; the The slider is provided with a vertical handle drop groove corresponding to the operating handle on the circuit breaker operation panel; the stopper assembly includes a stopper that is horizontally slidably arranged on the slider, and the stopper is placed on the side of the crank Driven to slide into the drop groove of the handle for lifting the operating handle, the end of the stopper away from the drop groove of the handle is set on the slide block through a tension spring.

Description

A circuit breaker reclosing mechanism

technical field

The utility model relates to the technical field of circuit breakers, in particular to a reclosing mechanism of a circuit breaker.

Background technique

A circuit breaker is a switching device that can close, carry and break current under normal circuit conditions, and can close, carry and break current under abnormal circuit conditions (including short-circuit conditions) within a specified time. It is generally composed of a contact system, an arc extinguishing system, an operating mechanism, a trip unit, and a casing. Circuit breakers can be used to distribute electric energy, start asynchronous motors infrequently, protect power lines and motors, and automatically cut off the circuit when they are severely overloaded, short-circuited, or under-voltage. Its function is equivalent to a fuse-type switch. Combination with overheating and underheating relays, etc., and there is generally no need to change parts after breaking the fault current.

The operating mechanisms for closing and opening low-voltage circuit breakers are generally divided into manual operating mechanisms and electric operating mechanisms. For the protection of circuit and motor, such as the electric operating mechanism of the reclosing circuit breaker whose authorized announcement number is CN213184174, the chute of the slider is set on the crank mechanism, so that the crank mechanism pushes the groove wall of the chute to drive the slider to move. The connecting rod or gear drive the control handle to open and close.

However, when the control handle of this type of operating mechanism falls automatically when the circuit breaker cuts off the circuit, the control handle needs to drive the slide block to fall together. Once the slide block cannot fall normally, the normal protection function of the circuit breaker will be affected.

Utility model content

The technical problem to be solved by the utility model is to provide a reclosing mechanism of the circuit breaker that can automatically realize the reclosing of the circuit breaker and will not affect the normal drop of the control handle after the switch is closed.

For solving the problems referred to above, the technical scheme that the utility model takes is:

A reclosing mechanism of a circuit breaker, which includes: a guide rail assembly arranged on the circuit breaker operation panel, a slide block slidably arranged on the guide rail assembly, a crank drive assembly arranged on the circuit breaker operation panel and a device a block assembly on the slider;

A horizontal elongated hole is opened on the slider corresponding to the crank of the crank drive assembly, and the crank is slidably arranged in the elongated hole;

A vertical handle drop slot is provided on the slider corresponding to the operating handle on the operating panel of the circuit breaker;

The stopper assembly includes a stopper horizontally slidably arranged on the slider, and the stopper slides into the drop slot of the handle under the drive of the crank to lift the operating handle, and the stopper One end far away from the drop groove of the handle is arranged on the slider through a tension spring.

As a preferred embodiment, a notch gear is fixed on the crank, a block rack is provided on the block, and the notch gear and the block rack can be engaged with each other;

The crank slides in the elongated hole so that the notch gear rotates relative to the slider so that the stopper slides;

The notched gear meshes with the stopper rack to prevent the stopper from being pulled by the extension spring.

As a preferred embodiment, the block assembly further includes a receiving guide rail and a sliding guide rail arranged on the slider;

The receiving guide rail and the sliding guide rail are respectively located on the left and right sides of the drop groove of the handle, the sliding guide rail is arranged below the elongated hole, and the receiving guide rail and the sliding guide rail are oppositely provided with a block accommodating cavity for The stop slides.

As a preferred embodiment, the upper end surface of the sliding guide rail is provided with a rack sliding groove corresponding to the stopper rack, and the stopper rack meshes with the notched gear after passing through the rack sliding groove .

As a preferred embodiment, the end of the sliding guide rail away from the drop groove of the handle is provided with a tension spring mounting plate;

The extension spring is arranged in the accommodating cavity of the stopper, and its two ends are respectively connected with the installation plate of the extension spring and the stopper.

As a preferred embodiment, the guide rail assembly includes two guide post mounting seats oppositely arranged and two guide posts symmetrically arranged between the two guide post mounting seats;

The two guide column mounting seats are arranged on the upper and lower sides of the operating handle, and the two guide columns are located on the left and right sides of the operating handle.

As a preferred implementation manner, two ends of the slider are symmetrically provided with two lugs corresponding to the guide column, and two through guide holes are opened on the two lugs.

As a preferred embodiment, the crank drive assembly includes a drive motor arranged in the circuit breaker housing, a reduction box, and a disk-shaped crank mounting seat arranged on the output shaft of the reduction box, and the crank is arranged on On the crank mounting seat, the drive motor drives the crank mounting seat to rotate so that the crank performs a circular motion with the output shaft of the reduction box as the axis.

The beneficial effects produced by adopting the above-mentioned technical scheme are:

The utility model realizes that when the crank circularly rotates to drive the slider to move up and down, the utility model realizes that the slider is moved up and down through the slider provided with the handle drop groove, the stopper arranged on the slider by horizontal sliding, and the crank engaged with the stopper through the notch gear. The block slides into the drop groove of the handle to lift the operating handle, or when the operating handle is lifted to the right position, the slider resets under the drive of the tension spring so that the operating handle can fall without interference. This design enables the operating handle to drop smoothly when the circuit is cut off, and the operating handle can be automatically lifted by the crank drive assembly.

Description of drawings

Fig. 1 is a structural schematic view of the embodiment when the stopper starts to slide.

Fig. 2 is a front view of Fig. 1 .

Fig. 3 is a schematic diagram of the structure of the block against the falling operating handle of the embodiment.

Fig. 4 is a structural schematic view of the block lifting the operating handle to a position in the embodiment.

Fig. 5 is a schematic structural diagram of the stopper reset of the embodiment.

Among them: 100 circuit breaker operation panel; 200 operating handle; 1 guide rail assembly; 1-1 guide column mounting seat; 1-2 guide column; 2 slider; 2-1 lug; Receiving rail; 2-4 slide rail; 2-41 tension spring mounting plate; 2-5 rack slide groove; 2-6 handle drop groove; 3 crank mount; 3-1 crank; 3-2 notched gear; block; 4-1 block rack; 5 extension spring; 6 block accommodating cavity.

detailed description

In order to make the purpose, technical solutions and advantages of the utility model clearer, the utility model is described clearly and completely below in conjunction with specific embodiments.

A reclosing mechanism of a circuit breaker as shown in FIGS. 1 to 5 is characterized in that it includes: a guide rail assembly 1 arranged on the circuit breaker operation panel 100 , a slider slidably arranged on the guide rail assembly 1 2. A crank drive assembly arranged on the operating panel 100 of the circuit breaker and a stopper assembly arranged on the slider 2 . A horizontal elongated hole 2-2 is provided on the slider 2 corresponding to the crank 3-1 of the crank drive assembly, and the crank 3-1 is slidably arranged in the elongated hole 2-2. The crank drive assembly includes a drive motor arranged in the circuit breaker housing, a reduction box and a disc-shaped crank mounting seat 3 arranged on the output shaft of the reduction box, and the crank 3-1 is arranged on the crank mounting seat 3 Above, the drive motor drives the crank mounting base 3 to rotate so that the crank 3-1 makes a circular motion with the output shaft of the reduction box as the axis.

As shown in FIG. 1 to FIG. 5 , the guide rail assembly includes two guide post mounting seats 1 - 1 arranged oppositely and two guide posts 1 - 2 symmetrically arranged between the two guide post mounting seats 1 - 1 . The two guiding column mounting seats 1 - 1 are arranged on the upper and lower sides of the operating handle 200 , and the two guiding columns 1 - 2 are located on the left and right sides of the operating handle 200 . The two ends of the slider 2 are symmetrically arranged with two lugs 2-1 corresponding to the guide column 1-2, and the two lugs 2-1 are provided with through guide holes.

As shown in Fig. 1, the operating handle 200 corresponding to the circuit breaker operating panel 100 on the slider 2 is provided with a handle drop groove 2-6 in the vertical direction, and the handle drop groove 2-6 is in the shape of n as a whole. The part can abut against the operating handle 200 so as to autonomously drive the operating handle 200 to fall and disconnect.

As shown in Figure 1, the block assembly includes a block 4 horizontally slidably arranged on the slider 2, and the block 4 slides into the handle drop groove 2-6 driven by the crank 3-1 For lifting the operating handle 200 , the end of the stopper 4 away from the handle drop groove 2 - 6 is set on the slider 2 through a tension spring 5 . In this embodiment, the crank 3-1 is fixed with a notch gear 3-2, the block 4 is provided with a block rack 4-1, and the notch gear 3-2 is connected to the block tooth Bar 4-1 is engageable. The crank 3-1 slides in the elongated hole 2-2 to make the notch gear 3-2 rotate relative to the slider 2 to make the stopper 4 slide. See Figure 1 and Figure 2 for details. When the notch gear 3-2 is driven by the crank 3-1 and rotates relative to the slider 2 (block rack 4-1) to the meshing state, the block 4 follows the notch gear 3-2. Sliding horizontally under the drive of the notch gear (simultaneously there is the relative horizontal sliding of the meshing structure provided by the notch gear 3-2 and the sliding caused by the thrust to the left provided by the notch gear 3-2).

The notch gear 3-2 meshes with the stopper rack 4-1 to prevent the stopper 4 from being pulled by the tension spring 5, see Figure 5 for details, when the crank 3-1 drives the gear 3-2 to move When the position in Fig. 5 is reached, the notch gear 3-2 moves away from the stopper rack 4-1, so that the stopper rack 4-1 loses the restriction in the horizontal direction and then resets under the drive of the extension spring 5. At this time, the handle 200 below Can fall freely without obstruction (while breaking the circuit). This design enables the circuit breaker to play a role in protecting the circuit in time when there is a permanent fault on the line.

Referring to FIG. 1 and FIG. 2 , the block assembly further includes a receiving guide rail 2 - 3 and a sliding guide rail 2 - 4 arranged on the slider 2 . The receiving guide rail 2-3 and the sliding guide rail 2-4 are respectively located on the left and right sides of the handle drop groove 2-6, the sliding guide rail 2-4 is arranged below the elongated hole 2-2, and the receiving guide rail 2-4 The guide rail 2-3 and the sliding guide rail 2-4 are oppositely provided with a stopper accommodating cavity 6 for the stopper 4 to slide. The upper end surface of the sliding guide rail 2-4 is provided with a rack sliding groove 2-5 corresponding to the stopper rack 4-1, and the stopper rack 4-1 passes through the rack sliding groove 2-5 Mesh with the notch gear 3-2 afterward. An extension spring mounting plate 2-41 is provided at the end of the sliding guide rail 2-4 away from the handle drop groove 2-6. The extension spring 5 is arranged in the block accommodating chamber 6 , and its two ends are respectively connected with the extension spring mounting plate 2 - 41 and the block 4 .

Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not The essence of the corresponding technical solutions deviates from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims (8)

1. A reclosing mechanism of a circuit breaker, characterized in that it comprises: a guide rail assembly arranged on the circuit breaker operation panel, a slide block slidably arranged on the guide rail assembly, and a slide block arranged on the circuit breaker operation panel The crank drive assembly and the stopper assembly arranged on the slider; A horizontal elongated hole is opened on the slider corresponding to the crank of the crank drive assembly, and the crank is slidably arranged in the elongated hole; A vertical handle drop slot is provided on the slider corresponding to the operating handle on the operating panel of the circuit breaker; The stopper assembly includes a stopper horizontally slidably arranged on the slider, and the stopper slides into the drop slot of the handle under the drive of the crank to lift the operating handle, and the stopper One end far away from the drop groove of the handle is arranged on the slider through a tension spring. 2. A circuit breaker reclosing mechanism according to claim 1, characterized in that a notch gear is fixed on the crank, a stopper rack is provided on the stopper, and the notch gear and the notch gear are The stopper rack can be engaged; The crank slides in the elongated hole so that the notch gear rotates relative to the slider so that the stopper slides; The notched gear meshes with the stopper rack to prevent the stopper from being pulled by the extension spring. 3. The reclosing mechanism of a circuit breaker according to claim 2, characterized in that, The block assembly also includes a receiving guide rail and a sliding guide rail arranged on the slider; The receiving guide rail and the sliding guide rail are respectively located on the left and right sides of the drop groove of the handle, the sliding guide rail is arranged below the elongated hole, and the receiving guide rail and the sliding guide rail are oppositely provided with a block accommodating cavity for The stop slides. 4. A reclosing mechanism for a circuit breaker according to claim 3, wherein a rack sliding groove is provided on the upper end surface of the sliding guide rail corresponding to the stopper rack, and the stopper rack passes through The sliding groove of the rack meshes with the notched gear. 5. The reclosing mechanism of a circuit breaker according to claim 3, wherein a tension spring mounting plate is provided at the end of the sliding guide rail far away from the drop groove of the handle; The extension spring is arranged in the accommodating cavity of the stopper, and its two ends are respectively connected with the installation plate of the extension spring and the stopper. 6. The reclosing mechanism of a circuit breaker according to claim 1, wherein the guide rail assembly includes two guide column mounting seats oppositely arranged and two guide rails symmetrically arranged between the two guide column mounting seats. column; The two guide column mounting seats are arranged on the upper and lower sides of the operating handle, and the two guide columns are located on the left and right sides of the operating handle. 7. A reclosing mechanism for a circuit breaker according to claim 6, characterized in that two ends of the slider are symmetrically provided with two lugs corresponding to the guide column, and two through lugs are provided on the two lugs. pilot hole. 8. The reclosing mechanism of a circuit breaker according to claim 1, wherein the crank drive assembly includes a drive motor arranged in the circuit breaker housing, a reduction box and an output shaft arranged on the reduction box The disc-shaped crank mounting seat, the crank is arranged on the crank mounting seat, and the drive motor drives the crank mounting seat to rotate so that the crank acts as a circle centered on the output shaft of the reduction box sports.

Images