Energy storage type operating mechanism and circuit breaker

Abstract

The utility model belongs to the field of circuit breakers, and particularly relates to an energy storage type operating mechanism and a circuit breaker, the energy storage type operating mechanism comprises a shell, a movable contact frame, a handle assembly, an energy storage piece, an energy storage torsion spring and a limiting piece, when the handle assembly drives the movable contact frame to rotate towards a closing direction, the movable contact frame and the limiting piece are matched in a limiting manner, so that the movable contact frame cannot rotate towards the closing direction; when the movable contact frame and the limiting piece form limiting matching, the energy storage piece rotates under the closing rotating force of the handle assembly to enable the energy storage torsion spring to store energy, and when the energy storage torsion spring completes energy storage, the energy storage piece and the limiting piece are matched to enable the limiting piece to rotate from the locking position to the unlocking position, and the limiting matching of the limiting piece and the movable contact frame is relieved. The energy storage torsion spring releases energy to enable the movable contact frame to rotate to a closing position; the energy storage torsion spring is compressed through the energy storage piece, energy storage of the energy storage torsion spring is achieved, the energy storage piece drives the limiting piece to release limiting from the movable contact frame, the energy storage torsion spring drives the movable contact frame to act rapidly, rapid closing is achieved, the structural design is small in occupied space, and miniaturization design of the circuit breaker can be achieved easily.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of circuit breaker, specifically relates to a kind of energy storage type operating mechanism and circuit breaker. BACKGROUND

[0002] Small circuit breaker is also called micro circuit breaker, it is suitable for 50 / 60Hz rated voltage 230 / 400V, rated current to 125A line overload and short-circuit protection, it can also be used as the infrequent operation conversion of line under normal circumstances.Small circuit breaker is mainly used in industry, commerce, high-rise and civil residence and various places.In the closing of circuit breaker, operating mechanism drives moving frame action, moving frame drives moving contact and static contact closure.Circuit breaker has uncontrollable factor in the process of manual closing, the fast and slow of closing speed is completely influenced by artificial factor, when the operator closes with slower speed, the closing speed of moving contact and static contact is slower, so that the duration of spark between moving contact and static contact is longer, leading to the burnout of contact, thereby shortening the service life of circuit breaker.

[0003] The application number 202411855081.3 discloses a kind of quick closing operating mechanism of circuit breaker, in the process of closing, handle is quickly staggered after the cooperation of driving energy storage limiting piece and the abutment of contact support short time abuts, to realize the quick closing of the operating mechanism, although, the operating mechanism can speed up closing speed.But, the distance between the handle of the operating mechanism and contact support is larger, energy storage limiting piece is through in the handle and contact support, need to reserve larger internal space for energy storage limiting piece, it is not conducive to the miniaturization design of circuit breaker. SUMMARY

[0004] The utility model aims at overcoming the shortcomings and deficiencies of prior art, provide a kind of energy storage type operating mechanism and circuit breaker that can quickly close, it is favorable to improve the breaking capacity of circuit breaker, simple structure, small space occupation, it is favorable to miniaturization design.

[0005] To achieve the above object, the utility model adopts the technical scheme as follows: A kind of energy storage type operating mechanism, including shell;Moving contact holder, it is used to drive moving contact to execute opening and closing brake action and is arranged in shell;Handle assembly, it is used to drive moving contact holder to execute opening and closing brake action and is arranged in shell;Further include energy storage part, it is rotatably arranged on moving contact holder and is connected with handle assembly;Energy storage torsion spring, it is arranged between energy storage part and moving contact holder;Limiting piece, it has locking position, unlocking position relative to shell rotation, and it has elastic reset structure to make limiting piece keep in locking position;When handle assembly drives moving contact holder to rotate to closing brake direction, moving contact holder and limiting piece limit cooperation make moving contact holder unable to rotate to closing brake direction;When the limiting cooperation of moving contact holder and limiting piece is formed, energy storage part rotates under the closing brake rotating force of handle assembly to make energy storage torsion spring store energy, and when energy storage torsion spring completes energy storage, energy storage part and limiting piece cooperate to make limiting piece rotate from locking position to unlocking position, remove the limiting cooperation of limiting piece and moving contact holder, and energy storage torsion spring releases energy to make moving contact holder rotate to closing brake position.

[0006] In some embodiments, the limiting piece has a limiting arm that limits the movement of the moving contact holder.

[0007] In some embodiments, the moving contact holder has a limiting surface that cooperates with the limiting arm.

[0008] In some embodiments, the energy storage part has a cam portion that cooperates with the unlocking arm.

[0009] In some embodiments, the limiting piece has a guide arm that cooperates with the shell.

[0010] In some embodiments, the limiting piece has a reset torsion spring that keeps the limiting piece in the locking position.

[0011] In some embodiments, the energy storage part has a guide slot that cooperates with the moving contact holder.

[0012] In some embodiments, the moving contact holder has a positioning protrusion that cooperates with the energy storage torsion spring.

[0013] In some embodiments, the handle assembly comprises a handle, a positioning shaft, a lock catch, a lock catch torsion spring arranged between the moving contact frame and the lock catch, a jump catch rotatably arranged on the energy storage member and engaged with the lock catch, a U-shaped connecting rod connected between the handle and the jump catch, the positioning shaft sequentially passes through the through holes of the moving contact frame, the energy storage member and the lock catch, and forms a rotational connection between the moving contact frame, the energy storage member, the lock catch and the positioning shaft; the energy storage member is provided with a positioning boss matched with the jump catch, the positioning boss is inserted into the positioning hole of the jump catch, and the rotational connection between the jump catch and the positioning boss is formed.

[0014] The utility model also provides a circuit breaker, including the energy storage type operating mechanism as described above.

[0015] The utility model discloses the beneficial effect is as follows: adopt the operating mechanism of spring energy storage type structure design, energy storage torsion spring is compressed to the energy storage member, realizes the energy storage of energy storage torsion spring, and the energy storage member drives the limit piece and the moving contact frame to remove the location, and energy storage torsion spring drives the moving contact frame to execute the quick action of closing, can effectively speed up the closing speed, can effectively improve the breaking capacity of circuit breaker. The energy storage member is rotatably arranged on the moving contact frame and is connected with the handle assembly, and the energy storage member does not need to reserve space, and the energy storage torsion spring can play the energy storage function and can play the contact pressure increasing function, and the structure design is simpler, and the occupied space is small, is favorable to the miniaturization design of circuit breaker, and the limit piece is rotatably arranged on one side of the energy storage member and the contact frame, and the occupied space is smaller, and the limit piece adopts the two -way cooperation structure design, adopts the lever principle, when closing, the moving contact frame first cooperates with the moving contact frame limit, and the energy storage member drives the limit piece to act, makes the limit piece and the moving contact frame remove the location cooperation, thereby realizing the quick switching of energy storage torsion spring energy storage and energy release, and it is favorable to speed up the closing speed. The operating mechanism and the circuit breaker using the energy storage type operating mechanism of the utility model, in the closing process, rotates the handle, and the handle drives the jump catch and the lock catch to act through the U-shaped connecting rod, and the lock catch drives the moving contact frame to rotate to the closing direction, and the limit surface of the moving contact frame abuts on the limit piece, and the limit piece limits the rotation of the moving contact frame (at this time, the moving contact and the static contact still have a spacing), continue to rotate the handle, and the handle, the U-shaped connecting rod, the jump catch, the lock catch drive the energy storage member to rotate, and the energy storage member drives the energy storage torsion spring, and the energy storage torsion spring starts energy storage, and the limit piece is driven by the energy storage member (energy storage torsion spring energy storage is finished), and after the limit piece and the moving contact frame remove the location, the energy storage torsion spring drives the moving contact frame to continue to rotate to the closing direction quickly, and the moving contact frame drives the moving contact and the static contact to close quickly. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to these drawings without creative labor.

[0017] Figure 1 The internal structure diagram of the circuit breaker of the embodiment of the present application;

[0018] Figure 2 The perspective view of the energy storage type operating mechanism of the embodiment of the present application;

[0019] Figure 3 The exploded view of the energy storage type operating mechanism of the embodiment of the present application;

[0020] Figure 4 The structure diagram of the starting energy storage state of the embodiment of the present application;

[0021] Figure 5 The structure diagram of the closing state of the embodiment of the present application;

[0022] Figure 6 The perspective view of the energy storage part of the embodiment of the present application. DETAILED DESCRIPTION

[0023] In order to make the technical problems, technical solutions and beneficial effects of the present application more clearly understood, the present application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not to limit the present application.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs; the terms used herein are only for the purpose of describing specific embodiments and not to limit the present application. The terms "include" and "have" and any variations thereof in the specification and claims of the present application and the above description of drawings are intended to cover non-exclusive inclusion.

[0025] The directions and position terms mentioned in the present application, such as up, down, front, back, left, right, inner, outer, top, bottom, side, etc., are only the directions or positions of the drawings. Therefore, the directions and position terms used are used to illustrate and understand the present application, and are not a limitation on the scope of protection of the present application.

[0026] The present application will be further described in conjunction with the drawings and specific embodiments:

[0027] As shown in Figure 1 , a circuit breaker comprises an energy storage operating mechanism 20.

[0028] Wherein, as shown in Figure 2 , 3 , 4, 5, the energy storage operating mechanism 20 comprises a housing 10, a handle assembly 21, a moving contact frame 23 arranged in the housing 10 and used for driving a moving contact 22 to perform the opening and closing actions, the handle assembly 21 is arranged in the housing 10 and used for driving the moving contact frame 23 to perform the opening and closing actions; further comprising an energy storage member 24, which is rotatably arranged in the moving contact frame 23 and connected with the handle assembly 21; an energy storage torsional spring 25 arranged between the energy storage member 24 and the moving contact frame 23; a limiting member 26 which has a locking position and an unlocking position relative to the housing 10; the limiting member 26 is rotatably installed in the housing 10 and kept in the locking position, when the handle assembly 21 drives the moving contact frame 23 to rotate in the closing direction, the moving contact frame 23 and the limiting member 26 limit the rotation of the moving contact frame 23 in the closing direction; when the moving contact frame 23 and the limiting member 26 form the limiting cooperation, the energy storage member 24 rotates under the closing rotation force of the handle assembly 21 to make the energy storage torsional spring 25 store energy, and when the energy storage torsional spring 25 completes the energy storage, the energy storage member 24 cooperates with the limiting member 26 to make the limiting member 26 rotate from the locking position to the unlocking position, thereby releasing the limiting cooperation between the limiting member 26 and the moving contact frame 23, and the energy storage torsional spring 25 releases energy to make the moving contact frame 23 rotate to the closing position. The housing 10 is provided with a static contact 27, and the moving contact frame 23 is connected with the static contact 27 through the moving contact 22, the moving contact 22 and the moving contact frame 23 are integrated into an integral structure through hot riveting, and the connection between the moving contact and the moving contact frame is more compact.

[0029] As shown in Figure 1 , 2, 3, 4, 5, the limiting piece 26 is provided with a reset torsion spring 261, the reset torsion spring 261 makes the limiting piece 26 keep in the locking position, the limiting piece 26 has a limiting arm 262 limiting cooperation with the moving contact bracket 23, the limiting piece 26 has an unlocking arm 263 linkage cooperation with the energy storage piece 24. The limiting piece is limited cooperation with the moving contact bracket through the limiting arm, so as to ensure that the limiting piece and the moving contact bracket can be reliably limited, and ensure that the energy storage torsion spring can reliably store energy, the limiting piece is linkage cooperation with the energy storage piece through the unlocking arm, the energy storage piece drives the limiting piece to rotate through the unlocking arm, so that the limiting piece drives the limiting arm to be removed from the limiting of the moving contact bracket, so as to ensure that the energy storage torsion spring can reliably release energy, realize the moving contact bracket quickly moving to the closing direction. The moving contact bracket 23 is provided with a limiting surface 231 matched with the limiting arm 262, the limiting arm 262 abuts against the limiting surface 231, and the limiting cooperation of the limiting arm 262 and the limiting surface 231 is formed. The moving contact bracket is limited cooperation with the limiting arm through the limiting surface, so as to ensure that the limiting arm and the moving contact bracket can be reliably limited (locked). The energy storage piece 24 is provided with a cam portion 241 matched with the unlocking arm 263, the cam portion 241 acts with the energy storage piece 24 and drives the unlocking arm 263 to act, and the linkage cooperation of the unlocking arm 263 and the cam portion 241 is formed. The energy storage piece drives the unlocking arm to act through the cam portion, so as to ensure that the transmission of the energy storage piece and the unlocking arm is more reliable. The limiting piece 26 has a guide arm 264 matched with the shell 10, the shell 10 is provided with a guide positioning groove 101, the guide arm 264 is inserted into the guide positioning groove 101, and the guide arm 264 acts in the guide positioning groove 101 and reciprocates. The reset torsion spring 261 is sleeved on the limiting piece 26, one end of the reset torsion spring 261 abuts against the guide positioning groove 101, the other end of the reset torsion spring 261 abuts against the limiting arm 262, and the elastic force of the reset torsion spring 261 makes the limiting arm 262 towards the side of the moving contact bracket 23. The limiting piece is inserted into the guide positioning groove of the shell through the guide arm, so as to ensure that the limiting piece can reliably act in the shell, and be beneficial to improve the working reliability of the operating mechanism.

[0030] As Figure 2 、 3As shown in Figure 6, the energy storage component 24 has a guide groove 242 on one side that cooperates with the moving contact frame 23. The guide portion 232 of the moving contact frame 23 passes through the limiting groove 242. The guide portion of the moving contact frame passing through the guide groove of the energy storage component ensures reliable operation of the energy storage component and improves the working reliability of the operating mechanism. The moving contact frame 23 has a positioning protrusion 233 that cooperates with the energy storage torsion spring 25. The energy storage torsion spring 25 is sleeved on the positioning protrusion 233. The first torsion arm 251 of the energy storage torsion spring 25 abuts against the positioning groove 243 of the energy storage component 24, and the second torsion arm 252 of the energy storage torsion spring 25 abuts against the moving contact frame 23. The energy storage torsion spring is sleeved on the positioning protrusion of the moving contact frame, which facilitates the assembly of the energy storage torsion spring with the moving contact frame and the energy storage component, ensuring that the energy storage torsion spring can reliably store and release energy, and improving the working reliability of the operating mechanism.

[0031] like Figure 1 , 2 As shown in Figure 3, the handle assembly 21 includes a handle 211, a positioning shaft 212, a latch 213, a latch torsion spring 214 disposed between the moving contact frame 23 and the latch 213, a jumper 215 rotatably mounted on the energy storage component 24 and engaging with the latch 213, and a U-shaped connecting rod 216 connecting the handle 211 and the jumper 215. The positioning shaft 212 passes through the through hole 210 of the moving contact frame 23, the energy storage component 24, and the latch 213 in sequence, forming a rotatable connection between the moving contact frame 23, the energy storage component 24, the latch 213, and the positioning shaft 212. The positioning shaft is disposed within the housing. The handle assembly adopts a modular structure design. The handle can reliably drive the energy storage component through the U-shaped connecting rod, the jumper, and the latch, realizing the energy storage and release of the energy storage torsion spring, which is beneficial to improving the working reliability of the operating mechanism. The energy storage component 24 is provided with a positioning boss 244 that mates with the jump buckle 215. The positioning boss 244 is inserted into the positioning hole 2151 of the jump buckle 215, and forms a rotatable connection between the jump buckle 215 and the positioning boss 244. The jump buckle is rotatably mounted on the positioning boss of the energy storage component, which makes assembly more convenient and transmission more reliable.

[0032] The operating mechanism adopts a spring energy storage structure, an energy storage member compresses a torsional spring to realize energy storage of the torsional spring, the energy storage member drives a limiting member and a moving contact holder to be released from limiting, the torsional spring drives the moving contact holder to quickly perform a closing action, which can effectively accelerate the closing speed and improve the breaking capacity of the circuit breaker. The energy storage member is rotatably arranged on the moving contact holder and connected with a handle assembly, so that no space is reserved for the energy storage member, the torsional spring can realize energy storage and increase contact pressure, the structure design is simpler, the occupied space is smaller, and the circuit breaker is conducive to miniaturization design. The limiting member is rotatably arranged on one side of the energy storage member and the contact holder, and occupies a smaller space. The limiting member adopts a bidirectional matching structure design and a lever principle, the moving contact holder is first matched with the moving contact holder limiting, and then the energy storage member drives the limiting member to move, so that the limiting member and the moving contact holder are released from limiting, thereby realizing quick switching of energy storage of the torsional spring to energy release, which is conducive to accelerating the closing speed. Figure 4 The operating mechanism and the circuit breaker using the energy storage type operating mechanism of the utility model, in the closing process, rotating the handle, the handle drives the jump buckle and the lock buckle through the U-shaped connecting rod, the lock buckle drives the moving contact holder to rotate to the closing direction, the limiting surface of the moving contact holder abuts against the limiting arm of the limiting member (as shown in Figure 5 The operating mechanism and the circuit breaker using the energy storage type operating mechanism of the utility model, in the closing process, rotating the handle, the handle drives the jump buckle and the lock buckle through the U-shaped connecting rod, the lock buckle drives the moving contact holder to rotate to the closing direction, the limiting surface of the moving contact holder abuts against the limiting arm of the limiting member (as shown in

[0033] The above only describes one embodiment of the utility model, and is not used to limit the protection scope of the utility model; the protection scope of the utility model is defined by the claims, and any equivalent change and modification made according to the utility model is within the protection scope of the utility model patent.

Claims

1. An energy storage operating mechanism, comprising a housing; a moving contact holder arranged in the housing and used to drive a moving contact to perform opening and closing actions; a handle assembly arranged in the housing and used to drive the moving contact holder to perform opening and closing actions; characterized in that: Further comprising an energy storage member, rotatably arranged on the movable contact holder and connected with the handle assembly; an energy storage torsion spring, arranged between the energy storage member and the movable contact holder; a limiting member, rotatable relative to the housing and having a locking position and an unlocking position, and having an elastic reset structure to keep the limiting member in the locking position; when the handle assembly drives the movable contact holder to rotate in the closing direction, the movable contact holder and the limiting member are in limiting cooperation so that the movable contact holder cannot rotate in the closing direction; when the movable contact holder and the limiting member are in limiting cooperation, the energy storage member rotates under the closing rotation force of the handle assembly to store energy in the energy storage torsion spring, and when the energy storage torsion spring completes energy storage, the energy storage member and the limiting member cooperate to rotate the limiting member from the locking position to the unlocking position, releasing the limiting cooperation between the limiting member and the movable contact holder, and the energy storage torsion spring releases energy to rotate the movable contact holder to the closed position.

2. The energy storage operating mechanism of claim 1, wherein: The limiting member has a limiting arm for limiting cooperation with the movable contact holder, and the limiting member has an unlocking arm for linkage cooperation with the energy storage member.

3. The energy storage operating mechanism according to claim 2, wherein: The movable contact holder is provided with a limiting surface for limiting cooperation with the limiting arm, and the limiting arm abuts against the limiting surface, and the limiting cooperation between the limiting arm and the limiting surface is formed.

4. Energy storage operating mechanism according to claim 2 or 3, characterized in that: The energy storage member is provided with a cam portion for cooperation with the unlocking arm, the cam portion moves with the energy storage member and drives the unlocking arm to move, and the linkage cooperation between the unlocking arm and the cam portion is formed.

5. Energy storage operating mechanism according to claim 2 or 3, characterized in that: The limiting member has a guide arm for cooperation with the housing, the housing is provided with a guide positioning groove, the guide arm is inserted into the guide positioning groove, and the guide arm reciprocates in the guide positioning groove as the limiting member moves.

6. The energy storage operating mechanism of claim 1, wherein: The limiting member is provided with a reset torsion spring, and the reset torsion spring keeps the limiting member in the locking position.

7. The energy storage operating mechanism of claim 1, wherein: One side of the energy storage member has a guide groove for cooperation with the movable contact holder, and a guide portion of the movable contact holder is inserted into the limiting groove.

8. The energy storage operating mechanism of claim 1, wherein: The movable contact holder has a positioning protruding portion for cooperation with the energy storage torsion spring, the energy storage torsion spring is sleeved on the positioning protruding portion, a first torsion arm of the energy storage torsion spring abuts against a positioning groove of the energy storage member, and a second torsion arm of the energy storage torsion spring abuts against the movable contact holder.

9. The energy storage operating mechanism of claim 1, wherein: The handle assembly comprises a handle, a positioning shaft, a lock catch, a lock catch torsion spring arranged between the movable contact holder and the lock catch, a jump catch rotatably arranged on the energy storage member and engaged with the lock catch, and a U-shaped connecting rod connected between the handle and the jump catch, the positioning shaft passes through the through holes of the movable contact holder, the energy storage member and the lock catch in sequence, and the movable contact holder, the energy storage member, the lock catch and the positioning shaft are rotatably connected and cooperated; the energy storage member is provided with a positioning boss for cooperation with the jump catch, the positioning boss is inserted into a positioning hole of the jump catch, and the jump catch and the positioning boss are rotatably connected and cooperated.

10. A circuit breaker characterized by: The circuit breaker comprises the energy storage type operating mechanism according to any one of claims 1-9.

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