CN219370946U - Manual operating mechanism for circuit breaker and circuit breaker - Google Patents

Abstract

The utility model relates to a manual operating mechanism for a circuit breaker and the circuit breaker. The circuit breaker has a frame and a rotatable half shaft mounted to the frame, the half shaft having a half shaft lever, the manual operating mechanism comprising: a movable member adapted to be movably mounted to the frame, the movable member having an operating end and an actuating end, the actuating end being configured with a ramp facing the half shaft; a biasing member coupled to the movable member and applying a biasing force to the movable member away from the axle shaft; wherein the movable member is adapted to move in a first direction parallel to the axial direction of the axle shaft and to push the axle shaft lever with the inclined surface, and is further adapted to be biased by a biasing member to return in a second direction opposite to the first direction. The manual operation mechanism has the advantages of simple structure, fewer parts, convenient operation and cost reduction.

Description

Manual operating mechanism for circuit breaker and circuit breaker

Technical Field

The present utility model relates to a switching device, and more particularly, to a manual operating mechanism for a circuit breaker and a circuit breaker.

Background

A circuit breaker is a switching device capable of closing, carrying and breaking a current under normal circuit conditions and capable of closing, carrying and breaking a current under abnormal circuit conditions for a prescribed time. For some circuit breakers, besides an electric opening and closing mechanism, a manual opening and closing operation mechanism is further arranged, and a tripping half shaft is controlled to rotate around a central axis of the circuit breaker through a manual operation piece such as a button so as to realize opening or closing.

In general, the center axis of the trip half shaft is parallel to the direction of the pressing operation of the manual push button, and a conversion device is required to be provided between the center axis and the direction of the pressing operation of the manual push button in order to convert the manual pressing operation into the rotation of the trip half shaft. The known conversion means are cylindrical machined parts or sheet metal parts. For example, in one switching device, a middle crank arm is linked on a manual button, the movement direction is changed through the middle crank arm, and then the crank arm on a half shaft is driven to realize half shaft driving. In addition, the known conversion device is provided with a roller on the manual button, and the roller pushes the half axle crank arm.

The structure of the existing manual operation half shaft mechanism is complex, and parts are more, so that the cost is high. Accordingly, there is a need in the industry to improve the manual operation of the half shaft of a circuit breaker.

Disclosure of Invention

The present utility model aims to provide a manual operating mechanism which solves at least some of the above-mentioned technical problems.

The present utility model is also directed to a circuit breaker employing the improved manual operating mechanism described above.

According to one aspect of the present utility model, there is provided a manual operating mechanism for a circuit breaker having a frame and a rotatable half shaft mounted to the frame, the half shaft having a half shaft lever, the manual operating mechanism comprising: a movable member adapted to be movably mounted to the frame, the movable member having an operating end and an actuating end, the actuating end being configured with a ramp facing the half shaft; a biasing member coupled to the movable member and applying a biasing force to the movable member away from the axle shaft; wherein the movable member is adapted to move in a first direction parallel to the axial direction of the axle shaft and to push the axle shaft lever with the inclined surface, and is further adapted to be biased by a biasing member to return in a second direction opposite to the first direction.

According to the manual operating mechanism of the scheme, the movable piece can directly drive the half shaft to rotate around the central axis by means of the inclined plane arranged at the actuating end of the movable piece during the reciprocating 5 movement along the axial direction parallel to the half shaft, so that a transmission mechanism or an intermediate mechanism is omitted between the movable piece and the half shaft, and the operation of the movable piece is directly converted into the rotation of the half shaft. After the manual operation is finished, the movable piece can return to the initial position under the drive of the biasing piece. The manual operating mechanism of this scheme simple structure and part are less, and the operation of being convenient for can also reduce cost.

0 in some embodiments, the moveable member is configured as a plate having one end as the operating end and an opposite end as the actuating end.

According to the scheme, the movable part is constructed into an integrated plate-shaped part or sheet metal part, so that the cost is reduced and the processing is easy. The plate-shaped part occupies small space and cannot influence the arrangement of all functional units in the circuit breaker.

5 in some embodiments, one end of the plate forms a bent section as the operating end.

According to this aspect, the bending section is easy to operate manually, or is convenient to engage a manually operated button or the like.

In some embodiments, the moveable member has a cantilever arm and the biasing member is a spring that is nested to the cantilever arm and presses against the frame.

0 according to the present embodiment, a simple structure of arranging the biasing member is provided. One end of the cantilever is a free end which stretches in a suspending way, and the spring is also convenient to sleeve.

In some embodiments, the moveable member is configured with a hollowed out portion in which the cantilever is cantilevered.

In some embodiments, the manual operating mechanism further comprises a fixed 5 piece adapted to be mounted to the frame, one of the movable piece and the fixed piece having a slide slot, the other of the movable piece and the fixed piece having a slide block insertable into and movable along the slide slot.

According to the scheme, the sliding groove and the sliding block can accurately limit the movement path of the movable piece, so that the movable piece is prevented from being accidentally cheap, and the operation is simplified.

In some embodiments, the fixing member comprises a fixing plate adapted to be fixed to the frame, the fixing plate being provided with the slider, the movable member having the chute.

According to another aspect of the present utility model, there is provided a circuit breaker including: a frame; a half shaft rotatably mounted to the frame and having a half shaft lever; the manual operation mechanism is provided by the utility model.

In some embodiments, the frame has an opening in which a movable member of the manual operating mechanism is movably inserted.

In some embodiments, the half shaft includes a brake release half shaft and a brake closing half shaft, and the manual operation mechanism is provided corresponding to at least one of the brake release half shaft and the brake closing half shaft.

Additional features and advantages of the utility model will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following, or may be learned from practice of the utility model.

Drawings

Embodiments of the present utility model are described in detail below with reference to the attached drawing figures, wherein:

FIG. 1 is a schematic view of a manual operating mechanism according to an embodiment of the present utility model;

fig. 2 and 3 are schematic diagrams of a manual operating mechanism applied within a circuit breaker according to an embodiment of the present utility model.

Reference numerals illustrate:

1. a manual operating mechanism; 2. a movable member; 21. an operation end; 22. a bending section; 23.

an actuation end; 24. an inclined plane; 25. a chute; 26. a cantilever; 27. a hollowed-out portion; 28.

a stop surface; 3. a biasing member; 4. a fixing member; 41. a fixing plate; 42. a slide block; 43.

a bolt; 5. a frame; 6. a half shaft; 61. half axle crank arm

Detailed Description

Referring now to the drawings, the manual operating mechanism for a circuit breaker and the schematic solution of the circuit breaker disclosed in the present utility model will be described in detail. Although the drawings are provided to present some embodiments of the utility model, the drawings are not necessarily to scale and certain features may be exaggerated, removed, or partially sectioned to better illustrate and explain the present disclosure. The position of part of components in the drawings can be adjusted according to actual requirements on the premise of not affecting the technical effect. The appearances of the phrase "in the drawings" or similar language in the specification do not necessarily refer to all figures or examples.

Certain directional terms used hereinafter to describe the drawings, such as "inner", "outer", "above", "below" and other directional terms, will be understood to have their normal meaning and refer to those directions as they would be when viewing the drawings. Unless otherwise indicated, directional terms described herein are generally in accordance with conventional directions as understood by those skilled in the art.

The terms "first," "second," and the like, as used herein, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another.

The utility model provides a manual operation mechanism for manually controlling opening or closing of a circuit breaker, which does not need to additionally arrange an intermediate transmission mechanism between the manual operation mechanism and a half shaft in the circuit breaker, but directly transmits the motion of a manual operation end to the half shaft and converts the motion of the manual operation end into the motion of the half shaft, so that the opening or closing of the circuit breaker is realized.

Fig. 1 to 3 show a manual operating mechanism according to the utility model and its use in a circuit breaker. The circuit breaker may be, for example, a transverse circuit breaker, including a main body frame 5 and respective functional units mounted on the frame 5, including a conductive circuit, an operating mechanism, an arc extinguishing mechanism, and the like. The frame 5 may be formed by connecting a plurality of plate members intersecting each other in the lateral and vertical directions. The operating mechanism can drive a closing half shaft or a separating half shaft arranged on the frame 5 to rotate around the central axis of the operating mechanism, so that closing is realized to conduct the conductive loop, or separating is realized to break the conductive loop. The operating mechanism comprises an electric operating mechanism and a manual operating mechanism. The electric operating mechanism usually uses an electric motor to drive the half shaft to rotate through a transmission mechanism. The electric operating mechanism related to the present utility model may be selected from the prior art in the field, and will not be described herein. The manual operating mechanism and its working principle will be described in detail below.

As shown in fig. 1, the manual operating mechanism 1 is mounted on a frame 5, for example, on a cross plate of the frame 5. The manual operation mechanism 1 of the present utility model may be provided corresponding to each of the opening half shaft and the closing half shaft, or the manual operation mechanism 1 of the present utility model may be provided for only one of the opening half shaft and the closing half shaft, and other existing manual operation mechanisms may be provided for the other of the opening half shaft and the closing half shaft. Fig. 2 and 3 show that two manual operating mechanisms 1 are provided in the circuit breaker, corresponding to the opening half shaft and the closing half shaft, respectively. The structure and function of the two manual operation mechanisms 1 are the same, and only one of the manual operation mechanisms 1 will be described below as an example.

As shown in fig. 2 and 3, the manual operating mechanism 1 is mounted on the frame 5 adjacent to a half shaft 6 (which may be a brake-off half shaft or a brake-on half shaft). The manual operating mechanism 1 includes a movable member 2, a biasing member 3, and a fixed member 4. The fixing member 4 is fixed to the frame 5, for example, to a cross plate of the frame 5. In the embodiment shown, the fixing element 4 is a plate-like or sheet metal element, comprising two sections intersecting each other, of which a first section is fixed to the frame 5 by means of bolts 42 and a second section is arranged next to the movable element 2. The embodiment shown in fig. 2 and 3 shows the securing member 4 as a separate piece that is removably mounted to the frame 5, but those skilled in the art will appreciate that the securing member may also be a bracket or brace integrally formed with the frame. For example, in one embodiment, a fixing plate is integrally bent from the cross plate of the frame 5 to protrude, as a fixing member for engagement with the movable member 2.

The movable element 2 can be moved back and forth relative to the frame 5 or relative to the fixed element 4. The cross plate of the frame 5 may be formed with an opening to accommodate the moveable member 2 and allow movement of the moveable member 2 in the opening. In other embodiments, rather than forming an opening in the cross plate of the frame to receive the moveable member, the moveable member may be positioned adjacent the edge of the cross plate, and movement relative to the frame may be effected.

The movable member 2 may be constructed as a plate-like member or a sheet metal member, one end of the plate-like member remote from the axle shaft 6 being a manually operable end 21, and the other end of the plate-like member opposite the axle shaft 6 being an actuating end 23 for engaging and driving rotation of the axle shaft 6 about its own central axis. The operating end 21 of the plate-like member forms a bent section 22 for ease of operation. The operating end 21 may be connected to a button or other type of manual operating member. In other embodiments, the bent section 22 of the operating end 21 may be replaced with other structures suitable for operating or connecting a manual operating member such as a button, or the operating end 21 may be directly configured as a manual operating button. The actuation end 23 of the plate is formed with a bevel 24, which bevel 24 is inclined towards the corresponding half shaft 6 and with respect to the axial direction of the half shaft 6. The angle of inclination of the inclined surface 24 with respect to the half shaft 6 should be set according to the construction in the circuit breaker, as long as the half shaft lever 61 of the half shaft 6 can move along the inclined surface 24 and the half shaft 6 can move synchronously to the tripped position during the movement of the movable member 2. In one embodiment, the incline 24 is inclined at an angle of between 30 ° and 75 ° relative to the half shaft 6.

A slide groove 25 is formed in the plate body of the movable element 2, and the second section of the fixed element 4 is arranged against or adjacent to the movable element 2 and is provided with a slide 42 which can be inserted into the slide groove 25. During the reciprocating movement of the movable element 2 in the direction parallel to the axis of the half-shaft 6, the slide 42 moves along the slide groove 25, precisely limiting the path of movement of the movable element 2 relative to the fixed element 4 or relative to the frame 5, preventing deviations. The chute and slide act as a stop limiting the path of movement of the moveable member, and in other embodiments other alternatives are possible. For example, in one embodiment, the chute is formed on the mount. And the slider is formed on the movable member. In another embodiment, the fixed member forms arms on both left and right sides thereof, and the movable member is disposed between the arms and moves along a path defined by the arms. In yet another embodiment, the clamping arm may be formed on the movable member, and the clamping arm grips the fixed member, so that the movement path of the movable member may be limited.

Although the movable member 2 is shown as a plate or sheet metal member, those skilled in the art will appreciate that the movable member 2 may have any suitable cross-sectional shape, so long as it is formed with a bevel at the actuating end facing the half shaft 6. For example, the movable member 2 may be provided with reinforcing ribs so that its cross-section is configured in a cross shape, thereby increasing the strength of the movable member 2.

The movable member 2 is formed with a cantilever 26 to mount the biasing member 3. In the embodiment shown, the biasing member 3 is a spring which is mounted on the cantilever arm 26 and has a cross-sectional dimension which is larger than the dimension of the opening of the frame which accommodates the movable member 2. When the movable member 2 is manually moved in a first direction towards the axle crank arm 61 on the axle 6, the spring is compressed between the movable member 2 and the frame 5, thereby compressing the stored energy. Once the manual operation is completed, the pushing force exerted on the movable member 2 is removed, and the spring drives the movable member 2 to move in a second direction opposite to the first direction to return. The cantilever 26 is formed in a hollowed out portion 27 of the movable member 2, one end being connected to the rest of the movable member 2, and the opposite end being cantilevered in the hollowed out portion 27, facilitating the mounting of the spring on the cantilever 26. In other embodiments, the biasing member may have other alternatives. For example, in one embodiment, the cantilever is omitted, and the hollowed-out portion of the moveable member is provided with a material having elastic properties, and can also be stored after being compressed. In other embodiments, the moveable member is not provided with a hollowed out portion, but rather forms a protruding mounting portion, with a spring or resilient material being pressed between the mounting portion and the frame.

As shown, the cantilever arm 26 is biased in the moveable member 2 and the second section of the fixed member 4 is of smaller transverse dimension than the first section of the fixed member 4 to bypass the spring that is sleeved over the biased cantilever arm 26. Those skilled in the art will appreciate that the dimensional relationship of the first and second sections of the mount 4 may be adjusted. For example, in one embodiment, the cantilever arm is centered in the moveable member, the stationary member forms an opening in a neutral position to avoid a spring that is mounted on the cantilever arm, and the first and second sections of the stationary member may be substantially uniform in lateral dimension.

The application of the manual operating mechanism of the present utility model to a circuit breaker will be described with reference to fig. 2 and 3.

Referring to fig. 2, the half shaft 6 may be a brake release half shaft rotatably mounted on the frame 5 about its own center axis. The brake-separating half shaft is provided with a half shaft crank arm 61. During manual opening, the operator pushes the operating end 21 of the movable member 2 so that the movable member 2 moves in a first direction (downward in the drawing) parallel to the axial direction of the half shaft. When the movable part 2 moves until the inclined surface 24 of the actuating end 23 of the movable part abuts against the half-shaft crank arm 61, the movable part 2 continues to move along the first direction, so that the half-shaft crank arm 61 moves along the inclined surface 24, the half shaft 6 is caused to rotate, and the tripping and opening of the circuit breaker are realized.

Referring to fig. 3, as can be seen from the foregoing, the biasing member 3 is compressed to store energy during movement of the movable member 2 in the first direction. When the manual opening is completed, the external force applied to the movable member 2 is removed, the biasing member 3 releases the energy, and the movable member 2 is driven to move away from the half shaft lever 61 in a second direction (upward in the drawing) opposite to the first direction and also parallel to the axial direction of the half shaft. The half shaft 6 is released and rotates the double buckle under the drive of the torsion spring, so that the breaker is allowed to be closed.

The inclined surface 24 of the actuating end 23 of the movable element 2 shown in the figures extends only over a part of the plate body of the movable element 2 and is connected at its extreme end, remote from the operating end 21, to a stop surface 28 parallel to the axial direction of the half shaft, which stop surface 28 interferes with the rotation of the half shaft 6 in the direction of the re-buckling, limiting the limit position of the re-buckling rotation of the half shaft 6.

Fig. 2 and 3 show two manual actuation mechanisms 1 facing away from each other, which correspond to a switching-off half-shaft and a switching-on half-shaft, respectively. Those skilled in the art will appreciate that the arrangement of the manual operating mechanism 1 should be adjusted based on the position of the half shafts.

It should be understood that although the present disclosure has been described in terms of various embodiments, not every embodiment is provided with a separate technical solution, and this description is for clarity only, and those skilled in the art should consider the disclosure as a whole, and the technical solutions in the various embodiments may be combined appropriately to form other embodiments that will be understood by those skilled in the art.

The foregoing is illustrative of the present utility model and is not to be construed as limiting the scope of the utility model. Any equivalent alterations, modifications and combinations thereof will be effected by those skilled in the art without departing from the spirit and principles of this utility model, and it is intended to be within the scope of the utility model.

Claims (10)

1. A manual operating mechanism for a circuit breaker having a frame (5) and a rotatable half shaft (6) mounted to the frame (5), the half shaft (6) having a half shaft lever (61), characterized in that the manual operating mechanism (1) comprises:

-a movable member (2) adapted to be movably mounted to the frame (5), the movable member (2) having an operating end (21) and an actuating end (23), the actuating end (23) being configured with a bevel (24) facing the half shaft (6), the direction of movement of the movable member (2) being parallel to the axial direction of the half shaft (6);

a biasing member (3) connected to the movable member (2) and applying a biasing force to the movable member (2) away from the half shaft (6);

wherein the movable member (2) is adapted to move in a first direction and to push against the half-shaft lever (61) with the inclined surface (24), the movable member (2) being further adapted to be biased by the biasing member (3) to return in a second direction opposite to the first direction.

2. A manual operating mechanism according to claim 1, characterized in that the movable member (2) is configured as a plate-like member, one end of which acts as the operating end (21) and the opposite end of which acts as the actuating end (23).

3. A manual operating mechanism according to claim 2, characterized in that one end of the plate-like member forms a bending section (22) as the operating end (21).

4. The manual operating mechanism according to claim 1, characterized in that the movable member (2) has a cantilever (26), the biasing member (3) being a spring which is fitted to the cantilever (26) and presses against the frame (5).

5. The manual operating mechanism according to claim 4, characterized in that the movable member (2) is configured with a hollowed-out portion (27), the cantilever (26) being cantilevered in the hollowed-out portion (27).

6. The manual operating mechanism according to any one of claims 1 to 5, characterized in that the manual operating mechanism (1) further comprises a fixed member (4) adapted to be mounted to the frame (5), one of the movable member (2) and the fixed member (4) having a slide groove (25), the other of the movable member (2) and the fixed member (4) having a slide block (42) insertable into the slide groove (25) and movable along the slide groove (25).

7. A manually operated mechanism as claimed in claim 6, characterised in that said fixed member (4) comprises a fixed plate (41) adapted to be fixed to said frame (5), said fixed plate (41) being provided with said slider (42), said movable member (2) having said runner (25).

8. A circuit breaker, comprising:

a frame (5);

a half shaft (6) rotatably mounted to the frame (5) and having a half shaft lever (61);

manual operating mechanism (1), which is a manual operating mechanism (1) according to any one of claims 1 to 7.

9. Circuit breaker according to claim 8, characterized in that the frame (5) has an opening in which a movable part (2) in the manual operating mechanism (1) is movably inserted.

10. Circuit breaker according to claim 8, characterized in that said half-shaft (6) comprises a breaking half-shaft and a closing half-shaft, said manual operating mechanism (1) being provided in correspondence of at least one of said breaking half-shaft and said closing half-shaft.