CN112786402A

CN112786402A - Quick automatic closing mechanism of molded case circuit breaker and molded case circuit breaker with same

Info

Publication number: CN112786402A
Application number: CN202110065522.XA
Authority: CN
Inventors: 杨雷; 李正羊; 陈亚杰
Original assignee: Jiangsu Suyi Electrical Appliance Co ltd
Current assignee: Jiangsu Suyi Electrical Appliance Co ltd
Priority date: 2021-01-19
Filing date: 2021-01-19
Publication date: 2021-05-11

Abstract

The invention relates to the technical field of power electronics, and discloses a quick and automatic switching-on mechanism of a molded case circuit breaker and the molded case circuit breaker provided with the quick and automatic switching-on mechanism, wherein the quick and automatic switching-on mechanism comprises a direct current motor, a fixed plate and a reduction gearbox, wherein the direct current motor is fixed on the circuit breaker; the gear is fixed at the output end of the reduction gearbox; one end of the single rack is rotatably connected to a lever bracket of a main mechanism of the circuit breaker along the radial direction of the gear, and a tooth opening of the single rack is meshed with the gear; and the hand-pulling mechanism is fixed on the single rack, and the single rack can be separated from the gear by pulling the single rack to one side. Compared with the prior art, the invention realizes the self-clutching of the circuit breaker and the rapid switching-on of the reclosing-closing operation reliably by the meshing rotation of the single rack and the gear which are rotationally connected, can realize both electric operation and manual operation, does not need to stop the direct current motor during the manual operation, and improves the efficiency.

Description

Quick automatic closing mechanism of molded case circuit breaker and molded case circuit breaker with same

Technical Field

The invention relates to the technical field of circuit breakers, in particular to a quick and automatic closing mechanism of a molded case circuit breaker and the molded case circuit breaker with the quick and automatic closing mechanism.

Background

The traditional opening and closing actions of the molded case circuit breaker need manual operation, and due to the development of a smart power grid, various assembled molded case circuit breakers appear in the market, and most of the assembled molded case circuit breakers are in linkage fit with a handle.

If chinese patent CN207149496U discloses an energy storage electric operating device for moulded case circuit breaker, it installs drive mechanism in the top of moulded case circuit breaker, cover whole moulded case circuit breaker's handle, thereby utilize drive mechanism to drive the handle operation, realize automatic switch-over, however this kind of mounting means leads to whole moulded case circuit breaker highly to increase, and it does not possess the possibility of manual operation, when needs carry out manual operation, need special instrument to dismantle drive mechanism or can not realize manual operation completely, reclosing mechanism will connect on the handle promptly, including reclosing mechanism need cover the handle, and make the circuit breaker can not directly pass through handle control, influence the convenience of manual control circuit breaker.

In consideration of manual and automatic switching, chinese patent CN 201811631779.1 discloses an intelligent molded case circuit breaker, which discloses that a handle is exposed to the outside, and manual and automatic switching is realized through a manual rotating piece.

A transmission mechanism on the traditional circuit breaker realizes reclosing-closing operation by using an alternating current motor, and the rotating speed of the alternating current motor is not high, so that rapid closing cannot be realized. And the self-clutch of the circuit breaker cannot be realized. Patent document CN110047713A discloses a reclosing transmission mechanism and a molded case circuit breaker, which have a complex structure and complex installation, and the reclosing-closing operation is realized by forward transmission and reverse rotation of a motor.

Chinese patent CN111105963A discloses a fast closing mechanism, which utilizes an internal double rack and an incomplete gear to realize the self-clutching of a circuit breaker, and reliably realizes the re-latching-closing operation, and the mechanism can be operated both electrically and manually, and uses a dc motor to increase the rotation speed, so as to realize the fast closing of the circuit breaker. However, the internal double-tooth rack is immovable, when the reclosing-closing operation is realized through manual operation, an external tool is needed to rotate an incomplete gear to realize self-clutching, and the manual operation is inconvenient and laborious; and when manual operation is used for realizing self-clutch, the direct current motor needs to be stopped for operation, and the operation is very inconvenient.

Disclosure of Invention

The purpose of the invention is as follows: aiming at the problems in the prior art, the invention provides a quick automatic closing mechanism of a molded case circuit breaker and the molded case circuit breaker provided with the quick automatic closing mechanism, which realize the self-clutching of the circuit breaker and reliably realize the quick closing of the reclosing-closing operation by arranging the meshing rotation of a single rack and a gear which are in rotating connection, have the two operations of electric operation and manual operation, do not need to stop a direct current motor during the manual operation, and improve the efficiency.

The technical scheme is as follows: the invention provides a quick and automatic switching-on mechanism of a molded case circuit breaker, which is used based on the molded case circuit breaker and is characterized by comprising the following components:

the direct current motor is fixed on the circuit breaker, a fixing plate is arranged above the direct current motor, and the output end of the direct current motor is connected with the reduction gearbox;

the gear is fixed at the output end of the reduction gearbox;

one end of the single rack is rotatably connected to a lever bracket of a main mechanism of the circuit breaker along the radial direction of the gear, and a tooth opening of the single rack is meshed with the gear;

and the hand-pulling mechanism is fixed on the single rack, and the single rack can be separated from the gear by pulling the single rack to one side.

Further, the hand-pulling mechanism comprises a rocker arm, one end of the rocker arm is rotationally connected to the fixed plate, protruding cylinders are fixed to the upper side face and the lower side face of the other end of the rocker arm, and the protruding cylinders on the lower side are slidably connected to the inner side of a first groove formed in the length direction of the single rack.

Further, the hand-pushing mechanism further comprises a hand-pushing plate, a second groove is formed in the lower surface of the hand-pushing plate, the protruding cylinder on the upper side of the rocker arm is connected in the second groove in a sliding mode, and a handle is arranged on the upper surface of the hand-pushing plate.

Further, the second groove is arranged on the lower surface of the hand push plate in an inclined mode.

Furthermore, the hand push plate is of a square structure, and the second groove is arranged along the diagonal edge of the hand push plate.

Furthermore, a limiting column is further arranged on the fixing plate, and the limiting column is arranged back to one side of the single-rack tooth opening.

The invention also discloses a molded case circuit breaker, and the molded case circuit breaker is provided with the rapid automatic closing mechanism of the molded case circuit breaker.

Has the advantages that:

1. the invention realizes the self-clutching of the circuit breaker and the rapid switching-on of the reclosing-switching-on operation reliably by arranging the single rack which is in rotary connection to be meshed with the gear for rotation, can realize two operations of electric operation and manual operation, does not need to stop the direct current motor during the manual operation, and improves the switching-on efficiency.

2. The power source of the rapid switching-on mechanism of the invention uses the direct current motor, the rotating speed is higher and can reach 25r/min, compared with the rotating speed of the alternating current motor of 2.5r/min, the rotating speed is greatly improved, and the rapid switching-on can be realized.

3. The hand-pulling mechanism provided by the invention utilizes the rocker arm to slide in the groove of the single rack, and can move the single rack to be not meshed with the gear through the protruding cylinder in a fluctuating way, so that the circuit breaker is self-clutched without switching off the direct current motor.

4. According to the invention, the hand push plate is arranged above the rocker arm, and the hand push plate can cover the single rack and can be directly pushed through the handle without other auxiliary tools, so that the manual opening and closing are convenient.

5. The inclined groove is formed in the lower surface of the hand push plate, so that horizontal poking can be guaranteed when the hand push plate is poked, and the single rack can rotate by taking one end of the single rack as an original point while being poked horizontally.

Drawings

FIG. 1 is a schematic view of an overall structure of a molded case circuit breaker rapid automatic closing mechanism and a circuit breaker connection of the present invention;

FIG. 2 is a schematic structural diagram of a quick automatic closing mechanism of a molded case circuit breaker according to the present invention;

fig. 3 is a schematic diagram of a structure of a hand push plate of the quick automatic closing mechanism of the molded case circuit breaker of the present invention.

The circuit breaker comprises a direct current motor 1, a gear 2, a single rack 3, a fixing plate 4, a reduction gearbox 5, a circuit breaker main mechanism lever support 6, a rocker arm 7, a support column 8, a raised cylinder 9, a first groove 10, a hand push plate 11, a second groove 12, a handle 13 and a limiting column 14.

Detailed Description

The invention is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

The invention relates to the technical field of circuit breakers, discloses a quick automatic closing mechanism of a molded case circuit breaker, which is a mechanism for quick closing on the circuit breaker and is used based on the molded case circuit breaker, and mainly comprises a power source direct current motor 1, a gear 2, a single rack 3 and a hand-pulling mechanism, wherein the power source direct current motor 1 is used for electric closing, the direct current motor 1 is fixed on the circuit breaker, a fixing plate 4 is fixed on the upper surface of the direct current motor 1, the fixing plate 4 is fastened through a screw, and the output end of the direct current motor 1 is connected with a reduction gearbox 5. The gear 2 is fixed at the output end of the reduction box 5, and the direct current motor 1 rotates to drive the gear 2 to rotate. 3 sides of single rack set up the tooth mouth, and its one end rotates along 2 radial directions of gear to be connected in circuit breaker main engine lever support 6, and 3 tooth mouths of single rack are engaged with gear 2, and the other end of single rack 3 is located fixed plate 4 upper surface. The hand-pulling mechanism is fixed on the single rack 3, and the single rack 3 can be separated from the gear 2 by pulling the single rack 3 to one side.

In this embodiment, the hand-pulling mechanism comprises a rocker arm 7, one end of the rocker arm 7 is rotatably connected to the fixing plate 4 through a support column 8, the upper side surface and the lower side surface of the other end of the rocker arm are respectively provided with a convex cylinder 9, the convex cylinders 9 on the lower side are slidably connected into a first groove 10 arranged along the length direction of the single rack 3, the single rack 3 can be pulled to one side by pulling the convex cylinders 9 on the upper side, so that the gear 2 is not meshed with the single rack 3, and the self-clutch is realized.

When the molded case circuit breaker is in the opening state, the tooth mouth of the single rack 3 is not meshed with the gear 2, and the direct current motor 1 is in the starting state at all. When manual switching-on is needed, the manual toggle rocker arm 7 drives the single rack 3 to rotate towards the gear 2 until the two are meshed, and then the reclosing process is completed. The direct current motor 1 continues to rotate, and the single rack 3 is meshed with the gear 2 until the closing process is completed.

In order to facilitate manual operation of an operator, when the operating personnel stir the rocker through the convex cylinders 9, the stirring track is arc-shaped, the rocker arm 7 is further provided with a hand pushing plate 11 in the embodiment, the lower surface of the hand pushing plate 11 is provided with a second groove 12, the convex cylinders 9 on the upper side of the rocker arm 7 are connected in the second groove 12 in a sliding manner, and the upper surface of the hand pushing plate 11 is provided with a handle 13. The second groove 12 is formed in an inclined shape at the lower surface of the hand push plate 11. In this embodiment, the hand pushing plate 11 has a square structure, and the second groove 12 is disposed along the diagonal edge of the hand pushing plate 11. When stirring through handle 13 like this, only need extend A direction level in fig. 1 and stir, the level stir handle 13 back, rocking arm 7 anticlockwise rotates certain angle, and at this moment, the protruding cylinder 9 of rocking arm 7 lower surface slides in first recess 10, and the protruding cylinder 9 of rocking arm 7 upper surface slides in the second recess 12 of hand push board 11 lower surface, realizes that the radian of a rocking arm 7 is rotatory, pulls away gear 2 with single rack 3.

A limiting column 14 is further arranged on the fixing plate 4, and the limiting column 14 is arranged on one side, back to the tooth mouth of the single rack 3. The single rack 3 is arranged between the limiting column 14 and the gear 2.

The invention also discloses a molded case circuit breaker, wherein the molded case circuit breaker is provided with the rapid and automatic switching-on mechanism of the molded case circuit breaker, and the mechanism is shown in the attached figure 1.

The above embodiments are merely illustrative of the technical concepts and features of the present invention, and the purpose of the embodiments is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims

1. The utility model provides a quick automatic combined floodgate mechanism of moulded case circuit breaker, uses based on moulded case circuit breaker, its characterized in that includes:

the direct current motor (1) is fixed on the circuit breaker, a fixing plate (4) is arranged above the direct current motor, and the output end of the direct current motor is connected with the reduction gearbox (5);

the gear (2) is fixed at the output end of the reduction gearbox (5);

one end of the single rack (3) is rotatably connected to a lever bracket (6) of a main mechanism of the circuit breaker along the radial direction of the gear (2), and a tooth opening of the single rack (3) is meshed with the gear (2);

the hand-pulling mechanism is fixed on the single rack (3), and the single rack (3) can be separated from the gear (2) by pulling the single rack (3) to one side.

2. The molded case circuit breaker rapid automatic closing mechanism according to claim 1, wherein the hand-operated mechanism comprises a rocker arm (7), one end of the rocker arm (7) is rotatably connected to the fixing plate (4), the upper and lower side surfaces of the other end of the rocker arm are both fixed with protruding cylinders (9), and the protruding cylinders (9) on the lower side are slidably connected in first grooves (10) arranged along the length direction of the single rack (3).

3. The molded case circuit breaker rapid automatic closing mechanism according to claim 2, wherein the hand-pulling mechanism further comprises a hand-pushing plate (11), a second groove (12) is formed in a lower surface of the hand-pushing plate (11), the protruding cylinder (9) on the upper side of the rocker arm (7) is slidably connected in the second groove (12), and a handle (13) is arranged on an upper surface of the hand-pushing plate (11).

4. The quick automatic closing mechanism for the molded case circuit breaker according to claim 3, wherein the second groove (12) is formed in an inclined shape on a lower surface of the hand push plate (11).

5. The mechanism for rapidly and automatically closing the molded case circuit breaker according to claim 4, wherein the hand push plate (11) has a square structure, and the second groove (12) is disposed along a diagonal side of the hand push plate (11).

6. The molded case circuit breaker rapid automatic closing mechanism according to claim 1, wherein the fixing plate (4) is further provided with a limiting column (14), and the limiting column (14) is arranged on one side of the single rack (3) facing away from the tooth opening.

7. A molded case circuit breaker, characterized in that the circuit breaker is provided with the molded case circuit breaker rapid automatic closing mechanism of any one of claims 1 to 6.