Breaker energy storage operating mechanism

Abstract

The utility model discloses an energy storage operating mechanism of a circuit breaker, which comprises a circuit breaker shell and an operating mechanism arranged in the circuit breaker shell, the operating mechanism is linked with an operating handle of the circuit breaker to drive a moving contact to swing to be matched with a static contact, and the operating mechanism comprises a supporting seat rotationally arranged in the circuit breaker shell. According to the utility model, the reset function of the lock catch and the supporting seat is realized through the wave-shaped elastic arm and the reset spring, so that a torsional spring does not need to be arranged between the lock catch and the supporting seat, the structure of the operating mechanism is more compact, the assembly of the lock catch and the supporting seat is simpler and more convenient, and the operation is more convenient. Modular assembly is achieved in the assembly process, and the assembly efficiency is improved; and the contact holding spring is arranged to provide holding force and buffering force for the moving contact, so that the moving contact and the static contact are not loosened after being contacted, and the phenomena of electric arc caused by contact loosening or heating caused by contact resistance increase and the like are avoided.

Description

Technical Field

[0001] This utility model relates to the field of circuit breaker technology, specifically to a circuit breaker energy storage operating mechanism. Background Technology

[0002] A circuit breaker is a switching device used to distribute electrical energy and protect power lines and motors. It can close, carry, and interrupt current, and can also carry and interrupt current in abnormal circuits within a specified time.

[0003] It generally consists of a contact system, an arc-extinguishing system, an operating mechanism, a trip unit, and a housing. When the operating current exceeds the set trip current, the electromagnetic trip unit generates an attractive force, drawing the armature to strike the lever. Under the action of the return spring, the main contacts break, cutting off the current.

[0004] Existing circuit breaker operating mechanisms typically incorporate a torsion spring between the latch and the support base for resetting the latch. However, this design results in a large gap between the latch and the support base, making the structure less compact. Furthermore, placing the torsion spring within the latch and support base increases assembly difficulty during production. During use, the lack of a structure to provide holding force to the moving contact can lead to loosening between the moving and stationary contacts after repeated breaking and contact, resulting in unstable contact, arcing, or increased contact resistance causing overheating.

[0005] Therefore, the applicant has made beneficial designs and found a way to solve the above problems. The technical solution to be introduced below is generated in this context. Utility Model Content

[0006] The present invention provides a circuit breaker energy storage operating mechanism to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A circuit breaker energy storage operating mechanism includes a circuit breaker housing and an operating mechanism disposed inside the circuit breaker housing. The operating mechanism is linked with the circuit breaker's operating handle to drive a moving contact to swing and engage with a stationary contact. The operating mechanism includes a support base rotatably mounted inside the circuit breaker housing. The support base is provided with a latch and a trip latch, which are connected by a latch. A reset element is provided on one side of the latch, and a wave-shaped spring arm is provided on the top of the reset element. A spring groove is provided on one side of the support base, and a reset spring is embedded in the spring groove. A moving contact groove is provided on one side of the support base, and a rotating shaft is provided in the moving contact groove. The moving contact is sleeved on the rotating shaft, and a contact holding spring is also sleeved on the rotating shaft. A first slot for engaging the reset spring is provided on one side of the top of the circuit breaker housing, and a second slot for engaging the wave-shaped spring arm is provided on one side of the first slot.

[0009] Preferably, the circuit breaker housing is further provided with a double metal plate, and a hot-release lever is provided on one side of the bottom of the latch, with one side of the hot-release lever contacting the top of the double metal plate.

[0010] Preferably, the circuit breaker housing is provided with an electromagnetic trip unit, the latch is provided with a protrusion on the side near the electromagnetic trip unit, and the top rod of the electromagnetic trip unit is correspondingly arranged with the protrusion.

[0011] Beneficial effects

[0012] The above-mentioned technical solutions of one or more technical solutions in the circuit breaker energy storage operating mechanism provided by this utility model embodiment have at least one of the following technical effects:

[0013] This invention utilizes a wave-shaped spring arm and a return spring to achieve the reset function of the latch and support base, eliminating the need for a torsion spring between the latch and support base. This results in a more compact operating mechanism structure and simplifies assembly between the latch and support base, enabling modular assembly and improving assembly efficiency. Furthermore, the inclusion of a contact retaining spring provides holding force and buffering force to the moving contact, cushioning the contact when it comes into contact with the stationary contact and pressing the moving contact firmly onto the stationary contact after contact. This prevents loosening of the moving and stationary contacts, avoiding phenomena such as arcing or increased resistance causing overheating due to loose contact, thus ensuring safe operation. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the internal structure of the circuit breaker housing of this utility model;

[0015] Figure 2 This is a schematic diagram of the operating mechanism of this utility model;

[0016] Figure 3 This is a cross-sectional structural diagram of the present invention.

[0017] The correspondence between the labels and component names in the attached figures is as follows:

[0018] 1. Circuit breaker housing; 11. Slot 1; 12. Slot 2; 2. Operating mechanism; 21. Support base; 211. Spring slot; 212. Return spring; 213. Moving contact slot; 214. Rotating shaft; 215. Contact holding spring; 22. Locking latch; 221. Reset component; 222. Wave-shaped spring arm; 223. Thermal trip lever; 224. Protrusion; 23. Trip lever; 3. Operating handle; 4. Moving contact; 5. Stationary contact; 6. Bimetallic; 7. Electromagnetic trip unit; 71. Top rod. Detailed Implementation

[0019] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0020] In the description of this utility model, it should be understood that the terms "upper", "lower", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0021] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] To avoid excessive and unnecessary details, well-known structures or functions will not be described in detail in the following embodiments.

[0023] like Figure 1-3 The diagram shown is a structural schematic of a circuit breaker energy storage operating mechanism according to a preferred embodiment of the present invention.

[0024] In this embodiment, a circuit breaker housing 1 and an operating mechanism 2 disposed inside the circuit breaker housing 1 are included. The operating mechanism 2 is linked with the operating handle 3 of the circuit breaker to drive the moving contact 4 to swing and cooperate with the stationary contact 5. The operating mechanism 2 includes a support base 21 rotatably mounted inside the circuit breaker housing 1. The support base 21 is provided with a latch 22 and a jump catch 23, which are connected by a snap fastener. A reset member 221 is provided on one side of the latch 22, and a wave-shaped spring arm 222 is provided on the top of the reset member 221. The wave-shaped spring arm 222 provides the spring force required for the latch 22 to reset. A spring groove 211 is provided on one side of the support base 21. The spring groove 211 is embedded with a reset spring 212, which provides a reset force for the support base 21. The support base 21 has a moving contact groove 213 on one side. The moving contact groove 213 is provided with a rotating shaft 214. The moving contact 4 is sleeved on the rotating shaft 214 and embedded in the moving contact groove 213. A contact retaining spring 215 is also sleeved on the rotating shaft 214. The two ends of the contact retaining spring 215 are respectively engaged with the moving contact 4 in the moving contact groove 214. The top side of the circuit breaker housing 1 is provided with a first groove 11 for cooperating with the reset spring 212. The first groove 11 is provided with a second groove 12 for cooperating with the wave-shaped spring arm 222 on one side. This invention achieves the reset function of the latch 22 and the support base 21 through the wave-shaped spring arm 222 and the reset spring 212, eliminating the need for a torsion spring between the latch 22 and the support base 21. This makes the structure of the operating mechanism 2 more compact and simplifies the assembly of the latch 22 and the support base 21. Modular assembly is achieved during the assembly process, improving assembly efficiency. Furthermore, the contact retaining spring 215 provides a holding force and buffers the moving contact 4 when it contacts the stationary contact 5. After contact, the moving contact 4 is pressed firmly onto the stationary contact 5, preventing loosening of the moving contact 4 and the stationary contact 5. This avoids phenomena such as arcing or increased resistance causing overheating due to loose contact, ensuring safety in use.

[0025] In this embodiment, the circuit breaker housing 1 is further provided with a double metal 6. A thermal trip rod 223 is provided on one side of the bottom of the latch 22. One side of the thermal trip rod 223 contacts the top of the double metal 6. The cooperation between the double metal 6 and the thermal trip rod 223 is the key mechanical linkage process to realize overload protection. The double metal 6 is made of two metals with different coefficients of thermal expansion pressed together. When the current is overloaded, the heating element (or the double metal itself heats up) causes the temperature of the double metal 6 to rise. Due to the different expansion rates of the two metals, the double metal 6 will bend towards the side with the smaller coefficient of expansion. The thermal trip rod 223 contacts the double metal 6 and transmits the deformation of the double metal 6 to the operating mechanism 2, ultimately triggering the circuit breaker to trip.

[0026] In this embodiment, the circuit breaker housing 1 is provided with an electromagnetic trip unit 7. The latch 22 is provided with a protrusion 224 on the side near the electromagnetic trip unit 7. The top rod 71 of the electromagnetic trip unit 7 is correspondingly arranged with the protrusion 224. When a short circuit occurs, the top rod 71 of the electromagnetic trip unit 7 pushes the protrusion 224, causing the latch 22 to drive the support base 21 and the moving contact 4 to move, so that the moving contact 4 and the stationary contact 5 are separated.

[0027] The circuit breaker energy storage operating mechanism of this utility model can be installed, connected or set in a common mechanical way, and can be implemented as long as it can achieve its beneficial effect.

[0028] All technologies not described in detail in this utility model are known technologies. Those skilled in the art can easily implement this utility model based on their understanding of this specification, and the contents shown in the accompanying drawings are part of this specification.

[0029] The above description, in conjunction with specific embodiments, provides a further detailed explanation of the present utility model. It should not be construed that the specific implementation of the present utility model is limited to these descriptions. For those skilled in the art, several simple deductions or substitutions can be made without departing from the concept of the present utility model, and all such deductions or substitutions should be considered to fall within the scope of protection defined by the claims submitted by the present utility model.

Claims

1. A circuit breaker energy storage operating mechanism comprising a circuit breaker housing (1) and an operating mechanism (2) arranged inside the circuit breaker housing (1), the operating mechanism (2) driving a movable contact (4) to swing in cooperation with a stationary contact (5) through linkage with an operating handle (3) of the circuit breaker, characterized in that: The operating mechanism (2) comprises a supporting seat (21) rotatably installed in the circuit breaker shell (1), the supporting seat (21) is provided with a lock catch (22) and a jump catch (23), the lock catch (22) and the jump catch (23) are snap connected, one side of the lock catch (22) is provided with a reset member (221), the top of the reset member (221) is provided with a wave-shaped elastic arm (222), one side of the supporting seat (21) is provided with a spring groove (211), the reset spring (212) is embedded in the spring groove (211), one side of the supporting seat (21) is provided with a moving contact groove (213), the moving contact groove (213) is provided with a rotating shaft (214), the moving contact (4) is sleeved on the rotating shaft (214), the rotating shaft (214) is further sleeved with a contact retaining spring (215), one side of the top of the circuit breaker shell (1) is provided with a first clamping groove (11) for cooperating with the reset spring (212), one side of the first clamping groove (11) is provided with a second clamping groove (12) for cooperating with the wave-shaped elastic arm (222).

2. The circuit breaker energy storage operating mechanism of claim 1, wherein: The circuit breaker shell (1) is further provided with a double gold (6) inside, one side of the bottom of the lock catch (22) is provided with a thermal trip pull rod (223), one side of the thermal trip pull rod (223) is in contact with the top of the double gold (6).

3. The circuit breaker energy storage operating mechanism of claim 1, wherein: The circuit breaker shell (1) is provided with an electromagnetic release (7) inside, one side of the lock catch (22) close to the electromagnetic release (7) is provided with a protrusion (224), the top rod (71) of the electromagnetic release (7) is correspondingly arranged with the protrusion (224).

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