CN-122000250-A - Double-connecting-rod reclosing mechanism and circuit breaker

Abstract

The application relates to the technical field of circuit breakers, in particular to a double-link reclosing mechanism and a circuit breaker, which comprise a driving assembly, a rotating piece, a first connecting rod, a second connecting rod, a fixed plate and a sliding block, wherein the driving assembly is used for driving the rotating piece to rotate, the first connecting rod comprises a connecting end and a driving end, the connecting end is eccentrically and rotatably connected to the rotating piece, the driving end is rotatably connected with the second connecting rod, the fixed plate and the sliding block are both positioned on one side of the rotating piece, the sliding block can slide along the direction close to or far from the rotating piece, the sliding block is used for driving a handle of the circuit breaker to rotate, a chute is formed in the fixed plate, the chute extends along the direction far from the rotating piece, the sliding end slides along the chute, the rotating end is rotatably connected with the sliding block, and the driving end is positioned between the sliding end and the rotating end.

Inventors

• HUANG HEMIN
• LI XUAN
• CAI QINGHUI

Assignees

• 浙江索能电气集团有限公司

Dates

Publication Date

20260508

Application Date

20260409

Claims (9)

1. 1. The double-connecting-rod reclosing mechanism is characterized by comprising a driving assembly (1), a rotating piece (2), a first connecting rod (3), a second connecting rod (4), a fixed plate (5) and a sliding block (6), wherein the driving assembly (1) is used for driving the rotating piece (2) to rotate, the first connecting rod (3) comprises a connecting end (31) and a transmission end (32), the connecting end (31) is eccentrically and rotatably connected to the rotating piece (2), the transmission end (32) is rotatably connected with the second connecting rod (4), the fixed plate (5) and the sliding block (6) are both positioned on one side of the rotating piece (2), the sliding block (6) can slide along the direction close to or far away from the rotating piece (2), the sliding block (6) is used for driving a breaker handle to rotate, a chute (51) is formed in the fixed plate (5), the chute (51) extends along the direction far away from the sliding block (6) more far away from the rotating piece (2), the second connecting rod (4) comprises a sliding end (41) and a rotating end (42), and the sliding end (41) is positioned between the sliding end (42) and the rotating end (42).
2. 2. The double-link reclosing mechanism according to claim 1, wherein the fixed plate (5) is further provided with a straight groove (52) communicated with the chute (51), the straight groove (52) extends along the sliding direction of the sliding block (6), and the straight groove (52) is positioned on one side of the chute (51) away from the rotating member (2).
3. 3. A double-link reclosing mechanism according to claim 2, wherein the angle between the chute (51) and the straight slot (52) is 120 degrees.
4. 4. The double-link reclosing mechanism according to claim 1, further comprising a guide rod (7) extending along the sliding direction of the slider (6), wherein the slider (6) is provided with a guide hole (61) through which the guide rod (7) passes.
5. 5. The double-link reclosing mechanism according to claim 1, wherein the slider (6) is provided with a slot (62) for inserting a handle of a circuit breaker.
6. 6. A double-link reclosing mechanism according to claim 1, wherein the driving assembly (1) comprises a driving source (11), an operating lever (12) and a pinion (13), the operating lever (12) is used for manual operation, the operating lever (12) is used for driving the pinion (13) to rotate, the rotating member (2) is a large gear, the driving source (11) is used for driving the large gear to rotate, the number of teeth of the pinion (13) is smaller than that of the large gear, and the pinion (13) is in meshed connection with the large gear.
7. 7. The double-link reclosing mechanism according to claim 6, further comprising a mounting plate (100), wherein the operating lever (12) is in anti-rotation connection with the pinion (13), the operating lever (12) is fixedly connected with the pressing plate (9), the pinion (13) is located between the pressing plate (9) and the mounting plate (100), and an elastic piece (110) for enabling the pressing plate (9) to press the pinion (13) on the mounting plate (100) is arranged between the pressing plate (9) and the mounting plate (100).
8. 8. A circuit breaker characterized by comprising a housing (8) and the double-link reclosing mechanism according to any one of claims 1-7, wherein the double-link reclosing mechanism is arranged in the housing (8).
9. 9. A circuit breaker according to claim 8, wherein the housing (8) includes a plurality of terminals (81) for connecting external lines, the slider (6) and the fixed plate (5) are arranged in an arrangement direction of the terminals (81), and the slider (6) slides in a direction perpendicular to the arrangement direction of the terminals (81).

Description

Double-connecting-rod reclosing mechanism and circuit breaker Technical Field The application relates to the field of circuit breakers, in particular to a double-link reclosing mechanism and a circuit breaker. Background A circuit breaker is a basic and important switching device which can not only switch on and off a current like a general switch, but also automatically "trip" off a circuit when abnormal conditions such as overload, short circuit, etc. occur in the circuit, thereby protecting a line, power equipment, and personal safety. In the related art, the circuit breaker comprises a reclosing mechanism, the reclosing mechanism comprises a driving source, a crank and a connecting rod, the driving source drives the crank to rotate, the crank is eccentrically and rotatably connected with one end of the connecting rod, and the other end of the connecting rod is rotatably connected with the handle, so that the handle is driven to rotate, and closing is realized. However, in order to realize stable switching-on in the reclosing mechanism, a crank with a larger size is required, so that the reclosing mechanism occupies a larger space, and the whole size of the circuit breaker is larger, which is not beneficial to the miniaturization design of the circuit breaker. Disclosure of Invention In order to reduce the occupied space of a reclosing mechanism, the application provides a double-link reclosing mechanism and a circuit breaker. The application provides a double-link reclosing mechanism and a circuit breaker, which adopt the following technical scheme: The utility model provides a double-link reclosing mechanism, includes drive assembly, rotation piece, first connecting rod, second connecting rod, fixed plate and slider, drive assembly is used for driving rotation piece rotation, first connecting rod includes link and driving end, the link is eccentric rotation and connects on rotating the piece, the driving end rotates with the second connecting rod and is connected, the fixed plate all is located rotation piece one side with the slider, the slider can be followed to be close to or keep away from the direction of rotating the piece and slide, the slider is used for driving the circuit breaker handle and rotates, the chute has been seted up on the fixed plate, the chute extends along the direction that keeps away from the slider more along keeping away from the rotation piece, the second connecting rod includes sliding end and rotation end, sliding end slides along the chute, rotation end rotates with the slider and is connected, the driving end is located between sliding end and the rotation end. Through adopting above-mentioned technical scheme, adopt drive assembly drive rotation piece to utilize the eccentric connection of first connecting rod and rotation piece, turn into the swing of first connecting rod with rotating, the slip constraint of rethread second connecting rod in the fixed plate chute, finally turn into the rectilinear motion of slider along specific direction with the swing. The double-connecting-rod combination and chute matching structure realizes that a larger sliding block stroke is obtained under the condition of smaller rotating part rotating radius, so that the breaker is effectively driven to close, and compared with the case that a strip-shaped groove is formed in a sliding block or a second connecting rod, the length of the second connecting rod can be reduced on the premise that the same sliding block sliding stroke is achieved by arranging the chute, and the labor-saving effect is achieved. Compared with the traditional mechanism using a large-size crank, the mechanism has the advantages that the movement space required by a driving part is obviously reduced, the layout of the whole reclosing mechanism is more compact, the whole size of the circuit breaker is reduced, and the requirement of miniaturized design is met. Optionally, the fixed plate is further provided with a straight groove communicated with the chute, the straight groove extends along the sliding direction of the sliding block, and the straight groove is located at one side of the chute away from the rotating piece. By adopting the technical scheme, the straight groove communicated with the chute is formed in the fixed plate, and a more complete movement path is provided for the sliding end of the second connecting rod. The straight groove is matched with the chute, the chute meets the track-changing distance requirement, the straight groove is arranged not for increasing the stroke of the sliding block, but plays a role in saving power, when the four-bar mechanism inside the handle reaches a laborious dead point, the sliding end of the second connecting bar is positioned in the straight groove, the torsion is reduced, and the effect of saving power is achieved. Optionally, the included angle between the chute and the straight chute is 120 °. By adopting the technical scheme, the included angle between the chut