CN219759507U - Reclosing mechanism and circuit breaker - Google Patents

Abstract

The utility model provides a reclosing mechanism and a circuit breaker, wherein the reclosing mechanism comprises: a manual mechanism; an electric mechanism; the transmission mechanism comprises a driving piece, a transmission shaft, an elastic piece and a sliding plate, wherein the elastic piece and the sliding plate are arranged on the transmission shaft; the transmission shaft is in power connection with the sliding plate and is used for driving the sliding plate to move between a first position and a second position; the transmission shaft is fixedly connected with the manual mechanism; the driving piece is in power connection with the electric mechanism; the driving piece is provided with a shaft hole, and the transmission shaft is at least partially embedded in the shaft hole and can rotate along the axis of the transmission shaft in the shaft hole; the hole wall of the shaft hole is provided with a thrust surface formed by extending along the radial direction of the driving piece; when the elastic piece contacts the thrust surface, the electric mechanism drives the driving piece to rotate along a preset direction; when the transmission mechanism is driven to rotate along a preset direction by the manual mechanism, the elastic piece is far away from the thrust surface. The utility model aims to solve the technical problem that the reclosing mechanism in the prior art is complex in structure.

Description

Reclosing mechanism and circuit breaker

Technical Field

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

Background

Reclosing circuit breaker is widely used in power transmission and distribution circuit, plays control and protection circuit's effect. The reclosing mechanism of the reclosing circuit breaker is provided with an electric mechanism and a manual mechanism. The electric operation is mainly to control and protect the circuit breaker by remote signals under unmanned conditions. For this purpose, the reclosing mechanism is usually provided as a manual structure and an electric mechanism integrated structure.

However, in the prior art, the reclosing mechanism is complicated in structure.

Disclosure of Invention

The utility model provides a reclosing mechanism and a circuit breaker, and aims to solve the technical problem that the reclosing mechanism in the prior art is complex in structure.

In a first aspect, the present utility model provides a reclosing mechanism comprising:

a manual mechanism;

an electric mechanism;

a sled having a first position and a second position; and

the transmission mechanism comprises a driving piece, a transmission shaft, an elastic piece and a sliding plate, wherein the elastic piece and the sliding plate are arranged on the transmission shaft; the transmission shaft is in power connection with the sliding plate and is used for driving the sliding plate to move between a first position and a second position; the transmission shaft is fixedly connected with the manual mechanism; the driving piece is in power connection with the electric mechanism;

wherein the driving member is configured with a shaft hole, and the transmission shaft is at least partially embedded in the shaft hole and can rotate along the axis of the transmission shaft in the shaft hole; the hole wall of the shaft hole is provided with a thrust surface formed by extending along the radial direction of the driving piece;

when the elastic piece contacts the thrust surface, the electric mechanism drives the driving piece to rotate along a preset direction so as to drive the transmission mechanism to rotate;

when the manual mechanism drives the transmission mechanism to rotate along the preset direction, the elastic piece is far away from the thrust surface.

Optionally, the hole wall of the shaft hole is provided with at least two circumferential curved surfaces and at least two thrust surfaces; at least two circumferential curved surfaces are arranged in a staggered manner in the circumferential direction of the driving piece, at least two thrust surfaces are arranged at intervals along the circumferential direction of the driving piece, and two adjacent circumferential curved surfaces are in transition through one thrust surface;

wherein, the elastic piece is abutted on any circumferential curved surface.

Optionally, the number of the elastic pieces is equal to the number of the thrust surfaces, and the at least two elastic pieces are arranged at intervals along the circumferential direction of the transmission shaft; and each circumferential curved surface is abutted against one elastic piece.

Optionally, the distance between the circumferential curved surface and the centroid of the driving piece is reduced and then increased in the preset direction;

and the transmission shaft is abutted on the circumferential curved surface at the position where the distance between the circumferential curved surface and the centroid of the driving piece is minimum.

Optionally, the elastic piece includes spring and stopper, the spring with the transmission shaft is connected, and will the stopper butt is on the pore wall in shaft hole.

Optionally, when the limiting block abuts against the thrust surface, the length of the spring is the maximum value.

Optionally, the transmission mechanism further comprises a swivel base, a rotating shaft and a rotating body, wherein the swivel base is fixed on a section of the transmission shaft extending out of the shaft hole;

the rotating shaft is eccentrically arranged on the rotary seat, and the rotating body is rotatably arranged on the rotating shaft; the sliding plate is provided with a sliding groove, the rotating body is arranged in the sliding groove, and when the rotating body rotates around the transmission shaft in the sliding groove, the sliding plate can be pushed to move between the first position and the second position.

Optionally, the reclosing mechanism further includes a first bracket, and the electric mechanism and the manual mechanism are respectively disposed on two sides of the first bracket in a thickness direction; the sliding plate and the manual mechanism are arranged on the same side of the first support in the thickness direction, the sliding plate is movably connected with the first support, and the moving direction of the sliding plate is parallel to the height direction of the first support.

Optionally, a contact is arranged on the first bracket, and a first boss and a second boss which are arranged at intervals along the circumferential direction of the rotary seat and can be in contact with the contact are arranged on the rotary seat; wherein the first boss contacts the contact when the slide plate is in the first position; the second boss contacts the contact when the slide plate is in the second position.

In a second aspect, embodiments of the present utility model also provide a circuit breaker including a reclosing mechanism as described above.

In the technical scheme of the embodiment of the utility model, when the position of the sliding plate needs to be switched, the transmission shaft can be driven along the preset direction by the manual mechanism so as to drive the sliding plate to move between the first position and the second position, and the elastic piece on the transmission shaft is far away from the pushed surface, so that the electric mechanism is not influenced when the manual mechanism is operated; when the transmission shaft is driven by the electric mechanism, although the elastic piece is far away from the thrust surface, the elastic piece can contact the pushed surface due to the fact that the driving piece rotates along the preset direction, and then the driving piece acts on the elastic piece with acting force to drive the transmission shaft to rotate, and then the sliding plate is driven to move between the first position and the second position. According to the embodiment of the utility model, the aim of respectively driving the sliding plate to move between the first position and the second position by the manual mechanism and the electric mechanism can be realized without arranging a clutch mechanism, so that the complexity of a reclosing mechanism can be reduced; in the second aspect, compared with the clutch mechanism which needs to occupy extra space in the reclosing mechanism, the utility model achieves the technical aim of high space utilization rate by arranging the elastic element on the built-in section of the transmission shaft and arranging the pushed surface which can be contacted with the elastic element on the hole wall of the shaft hole of the driving element, and the clutch mechanism does not need to occupy extra space; in the third aspect, in the prior art, the manual mechanism and the electric mechanism both need to drive the transmission mechanism through the clutch mechanism to transmit power, but in the utility model, the manual mechanism and the electric mechanism can both directly drive the transmission mechanism to drive the sliding plate to move, so that the transmission efficiency is higher and the energy consumption is lower.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of a reclosing mechanism according to an embodiment of the present utility model;

fig. 2 is a schematic structural diagram of a driving member in a reclosing mechanism according to an embodiment of the present utility model;

FIG. 3 is a schematic view of the structure of a driving member and a transmission shaft in the reclosing mechanism according to the embodiment of the present utility model;

fig. 4 is a dispersion schematic diagram of the structure of a transmission mechanism and an electric mechanism in the reclosing mechanism according to the embodiment of the present utility model;

FIG. 5 is a schematic view of a slide plate of a reclosing mechanism according to an embodiment of the present utility model in a first position;

FIG. 6 is a schematic view of a slide plate of a recloser mechanism according to an embodiment of the present utility model in a second position;

FIG. 7 is a schematic view of a slide plate of a recloser mechanism according to an embodiment of the present utility model between a first position and a second position;

fig. 8 is a schematic diagram of a decentralized structure of a circuit breaker with a reclosing mechanism according to an embodiment of the present utility model;

fig. 9 is a schematic diagram of a modular layout of a circuit breaker with a reclosing mechanism according to an embodiment of the present utility model.

List of reference numerals

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to fall within the scope of the utility model.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the present utility model, the term "exemplary" is used to mean "serving as an example, instance, or illustration. Any embodiment described as "exemplary" in this disclosure is not necessarily to be construed as preferred or advantageous over other embodiments. The following description is presented to enable any person skilled in the art to make and use the utility model. In the following description, details are set forth for purposes of explanation. It will be apparent to one of ordinary skill in the art that the present utility model may be practiced without these specific details. In other instances, well-known structures and processes have not been described in detail so as not to obscure the description of the utility model with unnecessary detail. Thus, the present utility model is not intended to be limited to the embodiments shown, but is to be accorded the widest scope consistent with the principles and features disclosed herein.

The reclosing circuit breaker comprises a reclosing mechanism and a handle. The reclosing mechanism drives the handle to switch the working state of the circuit breaker. The reclosing mechanism comprises a manual mechanism and an electric mechanism. Under normal conditions, the position of the sliding plate is changed between the manual mechanism and the electric mechanism through the clutch mechanism, so that the sliding plate drives the handle to switch the working state of the circuit breaker. However, the clutch mechanism has complex structure, low space utilization rate and low transmission efficiency, so that the reclosing mechanism has technical defects of complex structure, low space utilization rate and low transmission efficiency.

In order to solve the above technical shortcomings, as shown in fig. 1, an embodiment of the present utility model provides a reclosing mechanism, which includes a manual mechanism 4, an electric mechanism 2 and a transmission mechanism 3.

The transmission mechanism 3 includes a driving member 310, a transmission shaft 306, and an elastic member and a sliding plate 304 disposed on the transmission shaft 306, as shown in fig. 1 and 4. The drive shaft 306 is in power communication with the slide plate 304 for driving the slide plate 304 between the first position and the second position. The transmission shaft 306 is fixedly connected with the manual mechanism 4. The driving piece 310 is in power connection with the electric mechanism 2;

wherein, as shown in fig. 2 and 3, the driving member 310 is configured with a shaft hole 3103, and the driving shaft 306 is at least partially embedded in the shaft hole 3103 and rotatable along its axis within the shaft hole 3103; the hole wall of the shaft hole 3103 has a thrust surface 3102 formed to extend in the radial direction of the driver 310;

when the elastic member contacts the thrust surface 3102, the electric mechanism 2 drives the driving member 310 to rotate along a preset direction, so as to drive the transmission mechanism 3 to rotate;

when the manual mechanism 4 drives the transmission mechanism 3 to rotate along the preset direction, the elastic piece is far away from the thrust surface 3102.

In the technical scheme of the embodiment of the utility model, when the position of the sliding plate 304 needs to be switched, the transmission shaft 306 can be driven by the manual mechanism 4 along the preset direction so as to drive the sliding plate 304 to move between the first position and the second position, and the elastic piece on the transmission shaft 306 is far away from the pushed surface, so that the electric mechanism 2 is not influenced when the manual mechanism 4 is used for operation; when the driving shaft 306 is driven by the electric mechanism 2, although the elastic member is far away from the thrust surface 3102, the driving member 310 rotates along the preset direction, and the elastic member can contact the pushed surface, so that the driving member 310 applies a force to the elastic member to drive the driving shaft 306 to rotate, and further drive the sliding plate 304 to move between the first position and the second position. In the first aspect, the embodiment of the utility model can realize the purpose that the manual mechanism 4 and the electric mechanism 2 respectively drive the sliding plate 304 to move between the first position and the second position without arranging a clutch mechanism, thereby reducing the complexity of a reclosing mechanism; in the second aspect, compared with the clutch mechanism which needs to occupy additional space in the reclosing mechanism, the utility model achieves the technical purpose of high space utilization rate by arranging the elastic element on the built-in section of the transmission shaft 306 and arranging the pushed surface which can contact with the elastic element on the hole wall of the shaft hole 3103 of the driving element 310, without occupying additional space; in the third aspect, in the prior art, the manual mechanism 4 and the electric mechanism 2 both need to drive the transmission mechanism 3 through the clutch mechanism to perform power transmission, but in the utility model, the manual mechanism 4 and the electric mechanism 2 can directly drive the transmission mechanism 3 to drive the sliding plate 304 to move, so that the transmission efficiency is higher and the energy consumption is lower.

It should be noted and noted that the first position and the second position of the slide plate 304 correspond to different operating states of the circuit breaker, respectively. The slide 304 is connected to the handle 103 of the circuit breaker. When the slide plate 304 moves between the first position and the second position, the handle 103 follows the movement of the slide plate 304 to switch the operating state of the circuit breaker. The working state of the circuit breaker at least comprises a breaking/re-buckling state and a closing state. In an embodiment, when the slide plate 304 is in the first position, the circuit breaker is in a closed state; when the slide plate 304 is in the second position, the circuit breaker is in the open/rebuckled state. It should be noted that the slide plate 304 may also be in any free position between the first position and the second position, in which case the circuit breaker may be in a tripped state.

The preset direction is understood as follows: as the drive member 310 rotates in the rotational direction, the thrust surface 3102 gradually approaches the elastic member. If the operator operates the manual mechanism 4 in the reverse direction of the preset direction, the elastic member contacts the thrust surface 3102, and the thrust surface 3102 restricts the manual mechanism 4, so that the operating state of the circuit breaker cannot be correctly switched. For this reason, in general, a preset direction will be marked on the circuit breaker to prompt the operator to perform the correct operation. In an embodiment, the preset direction is clockwise. The technical direction in the art can carry out different structural designs according to the demand, will preset the direction and set up to anticlockwise direction.

In some embodiments, as shown in fig. 4, the electric machine 2 further includes a motor 201, a gear reducer 202, and a gear 203. The motor 201 drives the gear reducer 202 to rotate the gear 203. The driving member 310 has a disk shape, and an outer edge thereof is configured as a meshing tooth meshing with the gear 203. The gear 203 is engaged with the driving member 310 to drive the driving member 310 to rotate along a predetermined direction. Alternatively, the motor 201 may be used to drive the gear 203 and the driving member 310. Of course, in order to implement the turning motion of the driving member 310, the driving member 310 may also be driven by a mechanism capable of implementing turning, such as a worm driven by the motor 201, and the worm drives the driving member 310 to rotate.

Wherein, during the assembly, motor 201 and gear reducer 202 adopt vertical combination form, and motor 201 passes through the box of screw fixation at gear reducer 202. The gear reducer 202 is mounted on the second bracket 205. The second bracket 205 is mounted on the housing 1 of the circuit breaker.

In some embodiments, as shown in fig. 1, the manual mechanism 4 includes a hexagon socket screw 401, and the hexagon socket screw 401 is fixed on the transmission shaft 306. The sliding plate 304 can be driven to move by screwing the hexagonal fastening screw along a preset direction through a wrench.

In the embodiment, when the manual mechanism 4 drives the transmission mechanism 3 to move, the elastic element rotates along with the transmission shaft 306, so that the elastic element can be at any position on the circumferential curved surface 3101; the electric mechanism 2 is able to push the slide plate 304 in a preset direction if and only if the spring element abuts on the thrust surface 3102. When the state of the circuit breaker is switched electrically, the electric mechanism 2 needs to drive the driving member 310 to rotate by a random angle to enable the elastic member to abut against the thrust surface 3102. If the radian of the circumferential curved surface 3101 is 360 °, the maximum value of the random angle is 360 °, i.e.: the electromotive mechanism 2 requires at most one revolution of the driving member 310 to be able to bring the thrust surface 3102 into contact with the elastic member. If the radian of the circumferential curved surface 3101 is 180 °, the maximum value of the random angle is 180 °, namely: the motor mechanism 2 requires at most half a turn of the drive member 310 to be able to bring the thrust surface 3102 into contact with the spring member. Therefore, in order to reduce the maximum value of the random angle, in the embodiment of the present utility model, the hole wall of the shaft hole 3103 has at least two circumferential curved surfaces 3101 and at least two thrust surfaces 3102. At least two circumferential curved surfaces 3101 are arranged in a staggered manner in the circumferential direction of the driving member 310, at least two thrust surfaces 3102 are arranged at intervals along the circumferential direction of the driving member 310, and two adjacent circumferential curved surfaces 3101 are transited by one thrust surface 3102; wherein the elastic member abuts against any circumferential curved surface 3101.

For example, as shown in fig. 2, two circumferential curved surfaces 3101 are provided, and the radian of each circumferential curved surface 3101 is 180 °, so that the electric mechanism 2 needs to drive the driving member 310 at most half a turn to contact the thrust surface 3102 with the elastic member. For example, the number of the circumferential curved surfaces 3101 is three, and the radian of each circumferential curved surface 3101 is 120 °, so that the electric driving mechanism needs to drive the driving member 310 by at most one third of a turn to contact the thrust surface 3102 with the elastic member. The structure of this embodiment can effectively avoid excessive idling of the electric mechanism 2.

However, since the circumferential curved surfaces 3101 are offset in the circumferential direction, the elastic member may abut against a different circumferential curved surface 3101. For this reason, too many circumferential curved surfaces 3101 are not required to be provided in order to improve the stability of the propeller shaft 306. In this embodiment, the circumferential curved surface 3101 is provided in two, and the thrust surface 3102 is also provided in two. Namely: the elastic member is driven by the manual mechanism 4 to change shape and mutation once every half turn, so that the stability of the transmission shaft 306 is improved.

As an optional implementation manner of the foregoing embodiment, in order to further improve the stability of the transmission, the number of the elastic members is at least two, and the number of the elastic members is consistent with the number of the thrust surfaces 3102, and at least two elastic members are arranged at intervals along the circumferential direction of the transmission shaft 306; each of the circumferential curved surfaces 3101 is abutted against one of the elastic members. The elastic members are uniformly arranged in the circumferential direction of the transmission shaft 306, and each elastic member abuts on the circumferential curved surface 3101 to support the transmission shaft 306 in the shaft hole 3103. Meanwhile, a plurality of elastic members are arranged, so that the driving member 310 can push the transmission shaft 306 to rotate.

For example, the number of circumferential curved surfaces 3101 is two, and the number of elastic members is two. The two elastic members are respectively abutted on different circumferential curved surfaces 3101. When the electric mechanism 2 pushes the transmission shaft 306 to rotate, the two elastic members simultaneously respectively abut against the circumferentially spaced thrust surfaces 3102, so that the acting force of the driving member 310 acts on the elastic members through the thrust surfaces 3102, and the transmission shaft 306 is further driven to rotate, so as to drive the sliding plate 304 to move.

As an alternative implementation of the foregoing embodiment, the distance between the circumferential curved surface 3101 and the centroid of the driving member 310 decreases and increases in the preset direction; and the transmission shaft 306 abuts against the circumferential curved surface 3101 at a position where the distance between the circumferential curved surface 3101 and the centroid of the driving member 310 is minimum. In this structure, the transmission shaft 306 may contact on the circumferential curved surface 3101 such that there is a supporting contact surface between the transmission shaft 306 and the driving member 310, so that the movement can be stabilized when the reclosing mechanism switches the operating state of the circuit breaker. Even if the distance between the circumferential curved surface 3101 and the centroid of the driving member 310 becomes smaller and then larger in the preset direction, the elastic member can abut on the circumferential curved surface 3101 at any position in the circumferential direction based on its own deformation. In the structure, the compression amount of the elastic member is maximized at a position where the distance between the circumferential curved surface 3101 and the centroid of the driving member 310 is minimized.

In some embodiments, the distance between the circumferential curved surface 3101 and the centroid of the driving member 310 (the axis of the transmission shaft 306) along the preset direction may be reduced and then increased, so that when the manual mechanism 4 drives the driving mechanism 3, the compression amount of the elastic member is adaptively reduced and then increased according to the position of the limiting block 3063 on the driving member 310, until the limiting block 3063 moves to the next thrust surface 3102, and at this time, the elastic member is compressed first and gradually has a tendency to restore the original state during the movement of the transmission shaft 306, so that the elastic member is relatively soft when the limiting block 3063 is ejected. In some embodiments, the trend of the circumferential curved surface 3101 decreasing from the centroid of the driver 310 is greater than the trend of the circumferential curved surface 3101 increasing from the centroid of the driver 310 such that the distance of the start of the circumferential curved surface 3101 in the predetermined direction from the centroid of the driver 310 is greater than the distance of the end of the circumferential curved surface 3101 in the predetermined direction from the centroid of the driver 310.

As an alternative implementation of the foregoing embodiment, as shown in fig. 2, the elastic member includes a spring 3062 and a stopper 3063, where the spring 3062 is connected to the transmission shaft 306, and the stopper 3063 abuts against a hole wall of the shaft hole 3103 and may abut against the thrust surface 3102. The spring 3062 is fixed to the outer peripheral wall of the drive shaft 306. The stop 3063 may have a nesting hole to nest outside of the spring 3062. Alternatively, stop 3063 may be embedded within the cavity of spring 3062, remaining stationary with spring 3062. The limiting block 3063 abuts against the hole wall of the shaft hole 3103, so that the transmission shaft 306 and the driving piece 310 are in rotatable fit. When the manual mechanism 4 drives the transmission shaft 306 to rotate in a preset direction, the limiting block 3063 slides circumferentially along the circumferential curved surface 3101, and the driving piece 310 remains stationary at this time. When the driving member 310 is driven to rotate by the electric mechanism 2, if the limiting block 3063 does not contact the thrust surface 3102, the transmission shaft 306 does not rotate until the thrust surface 3102 contacts the limiting block 3063, thereby driving the transmission shaft 306 to rotate.

In some embodiments, as shown in FIG. 3, a third sleeve 3061 is provided over the drive shaft 306, the third sleeve 3061 being secured to the drive shaft 306. The spring 3062 is fixed to the third sleeve 3061.

In particular implementations, the spring 3062 acts to hold the stop 3063 tightly against the driver 310 to keep the rotation of the drive shaft 306 smooth by elastic deformation of the spring 3062.

In the structure in which the driver 310 has only one circumferential curved surface 3101, since the shaft hole 3103 has the thrust surface 3102 disposed in the radial direction inside, the circumferential curved surface 3101 has a sudden change in the radial direction; therefore, when the transmission shaft 306 is driven to rotate once by the manual mechanism 4, the spring 3062 ejects the limiting block 3063 to abut against the circumferential curved surface 3101.

In addition, in the structure of the driving member 310 having two or more circumferential curved surfaces 3101, since the circumferential curved surfaces 3101 are arranged in a staggered manner in the circumferential direction, when the transmission shaft 306 is driven to rotate for one circle by the manual mechanism 4, the limiting block 3063 will have a discontinuous movement track due to the staggered arrangement of the circumferential curved surfaces 3101, so that when the limiting block 3063 moves from one circumferential curved surface 3101 to another circumferential curved surface 3101, the limiting block 3062 will be ejected by the spring 3062 to abut against the other circumferential curved surface 3101, and therefore, the transmission shaft 306 rotates smoothly in the shaft hole 3103 along the preset direction without obstruction.

In an embodiment, the drive shaft 306 is mounted to the drive member 310 by the spring force of the spring member, and therefore, the spring 3062 is in a compressed state. The spring 3062 is normally compressed when the stopper 3063 abuts against the circumferential curved surface 3101, and its length is smaller than its length in normal state, so that the stopper 3063 is ejected when the circumferential curved surface 3101 is suddenly changed, and the stability of the movement of the transmission shaft 306 is maintained.

As an alternative to the above embodiment, the length of the spring 3062 is at a maximum when the stopper 3063 abuts against the thrust surface 3102. The thrust surface 3102 serves as a force application surface for the electric mechanism 2 to push the transmission shaft 306 to rotate, and also serves as a transition structure of the circumferential curved surface 3101 when the structure is suddenly changed. Further, during rotation of the drive shaft 306 relative to the driver 310, the stopper 3063 is always sprung out by the spring 3062 to abut against the other circumferential curved surface 3101 due to the transitional arrangement of the thrust surface 3102, and therefore, the length of the spring 3062 is at a maximum when the stopper 3063 abuts against the thrust surface 3102. The maximum length of the spring 3062 means that: spring 3062 is in a compressed state with a minimum amount of compression. The amount of compression of the spring 3062 in this state is less than or equal to the amount of compression of the spring 3062 when the stop 3063 is in the other position, but closer to the original length of the spring 3062.

In some embodiments, the circumferential curved surface 3101 may be spaced from the centroid of the driver 310 (the axis of the transmission shaft 306) in a predetermined direction from the thrust surface 3102 to the next thrust surface 3102 by a smaller distance, and the amount of compression of the spring 3062 may adaptively increase from a smaller value according to the position of the stopper 3063 on the driver 310 until the stopper 3063 moves to the next thrust surface 3102 when the manual mechanism 4 drives the transmission mechanism 3.

Alternatively, in some embodiments, the distance between the circumferential curved surface 3101 and the centroid of the driving member 310 (the axis of the transmission shaft 306) along the preset direction may be reduced and then increased, so that when the manual mechanism 4 drives the driving mechanism 3, the compression amount of the spring 3062 is adaptively reduced and then increased according to the position of the stopper 3063 on the driving member 310, until the stopper 3063 moves to the next thrust surface 3102, at this time, the spring 3062 is compressed first during the movement of the transmission shaft 306 and gradually has a tendency to recover the original length, so that the spring 3062 is relatively soft when the stopper 3063 is ejected. In this embodiment, the trend of the circumferential curved surface 3101 becoming smaller from the centroid of the driver 310 is greater than the trend of the circumferential curved surface 3101 becoming larger from the centroid of the driver 310, such that the distance from the start of the circumferential curved surface 3101 in the preset direction to the centroid of the driver 310 is greater than the distance from the end of the circumferential curved surface 3101 in the preset direction to the centroid of the driver 310.

As an alternative to the above embodiment, as shown in fig. 1, the transmission mechanism 3 further includes a swivel 301, a rotating shaft 302, and a rotator 303. The swivel 301 is fixed to a section of the drive shaft 306 extending out of the shaft hole 3103. In general, the swivel is journaled on the drive shaft 306, which may be welded, keyed, or fixedly connected by a screw connection. The rotation shaft 302 is eccentrically disposed on the swivel base 301. Namely: the rotational shaft 302 is disposed at a position offset from the axis of the transmission shaft 306 by the swivel mount 301. The rotator 303 is rotatably provided on the rotation shaft 302. In some embodiments, the rotor 303 may be a bearing. The rotator 303 may be a rotatable member that is rotatably fitted around the rotating shaft.

The sliding plate 304 is provided with a sliding groove, the rotator 303 is arranged in the sliding groove, and the rotator 303 can push the sliding plate 304 to move between the first position and the second position when rotating around the transmission shaft 306 in the sliding groove. When the transmission shaft 306 drives the swivel base 301 to rotate, the swivel body 303 is eccentrically arranged on the swivel base 301, so that the swivel body 303 rotates around the axis of the transmission shaft 306 in the chute to perform revolution motion. When the rotor 303 contacts the wall of the chute, the contact force generated by the rotor 303 causes the rotor 303 to perform a rotation motion about its axis and pushes the slide plate 304 to move between the first position and the second position. Referring to fig. 7, the chute has a first chute wall 3043 and a second chute wall 3044, and the first chute wall 3043 and the second chute wall 3044 are disposed on the rotation path of the rotator 303. As shown in fig. 6, when the rotator 303 contacts the first chute wall 3043, the sliding plate 304 is pushed to move downwards under the driving of the transmission shaft 306, so as to push the sliding plate 304 from the first position to the second position; as shown in fig. 5, when the rotator 303 contacts the second chute wall 3044, the sliding plate 304 is pushed upward by the driving shaft 306, so as to push the sliding plate 304 from the second position to the first position.

When the transmission shaft 306 drives the rotary seat 301 to rotate, and the rotary body 303 contacts the first chute wall 3043 or the second chute wall 3044, the rotary body 303 rotates around the axis of the transmission shaft 306 and also rotates around the axis of the rotation shaft 302, so that friction is reduced, and the sliding plate 304 is pushed to move; the rotator 303, due to its rotation about the axis of the drive shaft 306, will also be out of contact with either the first chute wall 3043 or the second chute wall 3044 during rotation during its movement to push the slide plate 304; when the rotator 303 is out of contact with the first chute wall 3043 or the second chute wall 3044, the rotator 303 rotates within the chute to stop rotating about its own axis.

As shown in fig. 5 or 6, the chute also has an upper limit chute wall 3041 and a lower limit chute wall 3042. As shown in fig. 6, when the transmission mechanism 3 performs the re-buckling/opening operation, the upper limit groove wall 3041 slides down until contacting with the inner hexagonal fastening screw 401, and the sliding plate 304 is at the second position; in synchronism, the handle 103 is in the rebuckling and opening position under the thrust of the slide plate 304. On the other hand, when the transmission mechanism 3 performs a closing operation, the lower limit groove wall 3042 slides upwards until contacting with the inner hexagonal fastening screw 401, and the sliding plate 304 is at the first position; synchronously, the handle 103 reaches a closing position under the thrust of the slide plate 304. The upper limit groove wall 3041 and the lower limit groove wall increase the contact surface with the inner hexagonal fastening screw 401, reduce the vibration impact and simultaneously reduce the wear rate.

In some embodiments, the manual mechanism 4 further includes a second hub 402, a spring 403, and a flat pad 404. The hexagon socket screw 401 passes through the second sleeve 402, the elastic sheet 403 and the flat pad 404 in turn and is fixed on the transmission shaft 306. Wherein, when the inner hexagon fastening screw 401 is fixed on the transmission shaft 306, the flat pad 404 keeps close to the swivel base 301, and the flat pad 404 is used for enlarging the contact area with the swivel base 301 and reducing the damage to the surface thereof. The spring plate 403 is used for preventing loosening, and increasing friction force when the hexagon socket screw 401 is screwed on the transmission member.

As an alternative implementation of the foregoing embodiment, as shown in fig. 4, the reclosing mechanism further includes a first bracket 308, and the electric mechanism 2 and the manual mechanism 4 are disposed on two sides of the first bracket 308 in a thickness direction, respectively. Typically, the thickness direction of the first bracket 308 is arranged in parallel with the axial direction of the transmission shaft 306. The electric mechanism 2 and the manual mechanism 4 are respectively arranged at two sides of the first bracket 308 in the thickness direction, which is beneficial to reducing the occupied space of the reclosing mechanism. In practice, the electric mechanism 2 is located on the inner side of the first bracket 308 facing the breaker housing 1, while the manual mechanism 4 is located on the outer side of the first bracket 308 facing away from the breaker housing 1, so that manual operation by an operator is facilitated. Since the handle 103 is disposed outside the housing 1, the slide plate 304 and the manual mechanism 4 are disposed on the same side of the first bracket 308 in the thickness direction, i.e., on the outer side of the first bracket 308, so as to facilitate space saving.

In the embodiment of the present utility model, the sliding plate 304 is movably connected to the first bracket 308, and the moving direction of the sliding plate 304 is parallel to the height direction of the first bracket 308. As shown in fig. 8, the first bracket 308 is provided with a guide post 305. The extending direction of the guide post 305 is perpendicular to the thickness direction of the first bracket 308, and parallel to the height direction of the first bracket 308. The slide plate 304 is provided with a guide hole into which the guide post 305 is inserted to form a moving pair. The slide plate 304 slides along the guide posts 305 to limit the degree of freedom in the slide left-right (width direction) and front-rear (thickness direction), maintaining the smoothness of the slide plate 304 when moving in the first and second positions.

Meanwhile, the first bracket 308 also has a function of protecting the driving member 310. When assembled, the first bracket 308 is secured to the housing 1 of the circuit breaker.

As an alternative to the above embodiment, as shown in fig. 4, the first support 308 is provided with a contact 204. The contacts 204 are in signal connection with a controller inside the circuit breaker. As shown in fig. 5 and 6, the swivel base 301 is provided with a first boss 3012 and a second boss 3011 which are circumferentially spaced apart and can contact the contact 204. As shown in fig. 5, wherein the first tab 3012 contacts the contact 204 when the slide 304 is in the first position. As shown in fig. 6, the second tab 3011 contacts the contact 204 when the slide 304 is in the second position. When the electric mechanism 2 drives the slide plate 304 to perform reclosing movement, if the controller outputs a closing signal to the electric mechanism 2, the electric mechanism 2 drives the swivel base 301 to move and drives the slide plate 304 to move; when the slide plate 304 reaches the first position, the first boss 3012 contacts the contact 204, the contact 204 is pressed to output a feedback signal, and the controller receives the feedback signal to further judge that the circuit breaker is at the closing position. When the electric mechanism 2 drives the slide plate 304 to perform reclosing movement, if the controller outputs a reclosing/opening signal to the electric mechanism 2, the electric mechanism 2 drives the swivel base 301 to move and drives the slide plate 304 to move; when the slide plate 304 reaches the second position, the second boss 3011 contacts the contact 204, the contact 204 is pressed to output a feedback signal, and the controller receives the feedback signal to further determine that the circuit breaker is in the rebuckling/breaking position. Namely: the controller sends a switching-on/switching-off signal, the electric driving mechanism starts to act, when the electric driving mechanism reaches a specified position, bosses distributed on the rotary seat 301 are contacted with the contacts 204, the contacts 204 are used for feeding back the switching-on signal or the switching-off/re-buckling signal at the moment, and the switching-on/switching-off state of the product is judged jointly through the contacts 204 of the indication position in the shell 1 of the circuit breaker.

In some embodiments, as shown in fig. 1 and 4, the transmission mechanism includes a swivel 301, a swivel shaft 302, a swivel body 303, a slide plate 304, a guide post 305, a transmission shaft 306, an outer bushing 307, a first bracket 308, a first shaft sleeve 309, a driving member 310, and an inner bushing 311. The rotary seat 301 is matched on the transmission shaft 306, and the matching is tight, so that the driving piece 301 can be easily and timely linked. A rotating body 303 is tightly matched above the rotating shaft 302, and the lower part of the rotating body is fastened to the rotating seat 301; the rotating shaft 302 and the rotating body 303 can adopt a compound riveting assembly mode or a rotating connection mode, so that abrasion during transmission is effectively reduced, and the rotating shaft and the rotating body can flexibly rotate. The slide plate 304 is positioned by the left and right sides of the guide post 305, and the four degrees of freedom of the slide plate 304 are limited. The transmission shaft 306 is internally provided with a telescopic limiting shaft, and is internally provided with a built-in telescopic spring 3062, so that the telescopic quantity can be conveniently adjusted in time according to the transmission state of the reclosing mechanism. Synchronous rotation with the 310 driving piece is effectively completed in the automatic reclosing state, and clockwise rotation is flexibly completed in the manual reclosing state without affecting the automatic reclosing mechanism. The outer bushing 307 and the inner bushing 311 adopt a stepped structure, an inner circular boss is used for fixing and limiting, and an outer circular boss is used for limiting the upper and lower degrees of freedom and reducing the internal friction. The transmission shaft 306 passes through the driving piece 310, the inner bushing 311 is matched with the second bracket 205, the outer bushing 307 is matched and inserted above the transmission shaft 306, the limit is completed by passing through the through hole of the first bracket 308 above the step groove, and finally the transmission shaft is fastened on the first bracket 308 by passing through the first shaft sleeve 309 through a screw.

The embodiment of the utility model also provides a circuit breaker, which comprises a reclosing mechanism. The reclosing mechanism adopts a part of or all of the technical solutions of the foregoing embodiments, so that the circuit breaker has a part of or all of the technical advantages of the foregoing embodiments. The circuit breaker of fig. 8 or 9 comprises a housing 1 and a handle 103. The housing 1 includes a middle cover 102 and a base 101. The reclosing mechanism is mounted on the middle cover 102 and/or the base 101, and the handle 103 is connected with the slide plate 304. The reclosing mechanism includes a first bracket 308 and a second bracket 205. The electric mechanism 2 is mounted on the second bracket 205. The slide plate 304 is movably mounted on a first bracket 308. The first leg 308 and the second leg 205 are secured to the middle cap 102 and/or the base 101, such as by threaded fastener connection, plugging, welding, etc.

The above describes in detail a reclosing mechanism and a circuit breaker provided by the embodiments of the present utility model, and specific examples are applied herein to illustrate the principles and embodiments of the present utility model, where the above description of the embodiments is only for helping to understand the method and core ideas of the present utility model; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in light of the ideas of the present utility model, the present description should not be construed as limiting the present utility model.

Claims (10)

1. A reclosing mechanism, comprising:

a manual mechanism;

an electric mechanism; and

the transmission mechanism comprises a driving piece, a transmission shaft, an elastic piece and a sliding plate, wherein the elastic piece and the sliding plate are arranged on the transmission shaft; the transmission shaft is in power connection with the sliding plate and is used for driving the sliding plate to move between a first position and a second position; the transmission shaft is fixedly connected with the manual mechanism; the driving piece is in power connection with the electric mechanism;

wherein the driving member is configured with a shaft hole; the transmission shaft is at least partially embedded in the shaft hole and can rotate along the axis of the transmission shaft in the shaft hole; the hole wall of the shaft hole is provided with a thrust surface formed by extending along the radial direction of the driving piece;

when the elastic piece contacts the thrust surface, the electric mechanism drives the driving piece to rotate along a preset direction so as to drive the transmission mechanism to rotate;

when the manual mechanism drives the transmission mechanism to rotate along the preset direction, the elastic piece is far away from the thrust surface.

2. The reclosing mechanism according to claim 1, wherein a hole wall of the shaft hole has at least two circumferential curved surfaces and at least two of the thrust surfaces; at least two circumferential curved surfaces are arranged in a staggered manner in the circumferential direction of the driving piece, at least two thrust surfaces are arranged at intervals along the circumferential direction of the driving piece, and two adjacent circumferential curved surfaces are in transition through one thrust surface;

wherein, the elastic piece is abutted on any circumferential curved surface.

3. The reclosing mechanism according to claim 2, wherein the number of the elastic members is equal to the number of the thrust surfaces, and the at least two elastic members are arranged at intervals along the circumferential direction of the transmission shaft; and each circumferential curved surface is abutted against one elastic piece.

4. The reclosing mechanism according to claim 2, wherein a distance between the circumferential curved surface and a centroid of the driving member becomes smaller and then larger in the preset direction;

and the transmission shaft is abutted on the circumferential curved surface at the position where the distance between the circumferential curved surface and the centroid of the driving piece is minimum.

5. The reclosing mechanism according to claim 1, wherein the elastic member includes a spring and a stopper, the spring being connected to the drive shaft, and abutting the stopper against a wall of the shaft hole and being capable of abutting against the thrust surface.

6. The reclosing mechanism according to claim 5, wherein a length of the spring is a maximum value when the stopper abuts against the thrust surface.

7. The reclosing mechanism according to claim 1, wherein the transmission mechanism further comprises a swivel mount, a rotating shaft, and a rotator, the swivel mount being fixed to a section of the transmission shaft extending out of the shaft hole;

the rotating shaft is eccentrically arranged on the rotary seat, and the rotating body is rotatably arranged on the rotating shaft; the sliding plate is provided with a sliding groove, the rotating body is arranged in the sliding groove, and when the rotating body rotates around the transmission shaft in the sliding groove, the sliding plate can be pushed to move between the first position and the second position.

8. The reclosing mechanism according to claim 7, further comprising a first bracket, wherein the electric mechanism and the manual mechanism are provided on both sides in a thickness direction of the first bracket, respectively; the sliding plate and the manual mechanism are arranged on the same side of the first support in the thickness direction, the sliding plate is movably connected with the first support, and the moving direction of the sliding plate is parallel to the height direction of the first support.

9. The reclosing mechanism according to claim 8, wherein a contact is provided on the first bracket, and a first boss and a second boss which are arranged at intervals along the circumferential direction of the swivel base and can be in contact with the contact are provided on the swivel base;

wherein the first boss contacts the contact when the slide plate is in the first position;

the second boss contacts the contact when the slide plate is in the second position.

10. A circuit breaker, characterized in that it comprises a reclosing mechanism according to any one of claims 1 to 9.