Rapid closure mechanism and circuit breaker

Abstract

The embodiment of the utility model provides a kind of quick closing mechanism and circuit breaker, it is related to circuit breaker technical field.Quick closing mechanism includes handle, mechanism seat and limiting piece being rotationally arranged in shell, mechanism seat is rotationally arranged with movable contact and lock catch, mechanism seat has unlocking part, limiting piece has the abutting surface for with movable contact resistance and the unlocking surface for with unlocking part resistance;Second elastic member is provided in shell, with the first action part of the linkage of limiting piece and the second action part of the linkage of lock catch;Mechanism seat rotates to first position, movable contact and abutting surface resistance, mechanism seat continues to rotate, unlocking part and unlocking surface resistance and drive limiting piece rotation;Mechanism seat is under closing position, lock catch is driven to rotate to with mechanism seat and remove lap, mechanism seat is driven to rotate to opening position, second action part drives lock catch to rotate and with mechanism seat lap.The utility model can improve the problem of current circuit breaker many parts, complex structure.

Description

Technical Field

[0001] This utility model relates to the field of circuit breaker technology, and more specifically, to a fast closing mechanism and a circuit breaker. Background Technology

[0002] A circuit breaker is an electrical appliance that functions as both a manual switch and an automatic protector against undervoltage, overload, and short-circuit faults. Circuit breakers can be used to distribute electrical energy, infrequently start asynchronous motors, and protect power lines and motors. They automatically disconnect the circuit in the event of severe overload, short circuit, or undervoltage faults, functioning similarly to a combination of a fuse switch and over / under-temperature relays.

[0003] The existing circuit breakers have multiple rotating mechanisms, each equipped with a reset torsion spring for resetting, resulting in numerous circuit breaker parts and a complex structure. Utility Model Content

[0004] The purpose of this invention is to provide a fast closing mechanism and a circuit breaker that can improve the current problems of circuit breakers having many parts and complex structures.

[0005] The embodiments of this utility model can be implemented as follows: In a first aspect, this utility model provides a quick-closing mechanism disposed within a housing, the quick-closing mechanism comprising: The handle is rotatably mounted on the housing; A mechanism base is rotatably mounted on the housing and linked to the handle. A movable contact is rotatably mounted on the mechanism base, and the movable contact is linked to the mechanism base through a first elastic element. A locking element is rotatably mounted on the mechanism seat, and the locking element overlaps with the mechanism seat to drive the locking element to rotate synchronously when the mechanism seat rotates; A limiting member is rotatably disposed on the housing. The mechanism seat has an unlocking part. The limiting member has an abutting surface for abutting against the moving contact and an unlocking surface for abutting against the unlocking part. The second elastic member has a first working part and a second working part, the first working part being linked with the limiting member, and the second working part being linked with the locking member; In this configuration, the handle drives the mechanism seat to rotate toward the closed position to a first position, where the moving contact abuts against the contact surface; the mechanism seat continues to rotate toward the closed position, where the unlocking part abuts against the unlocking surface and drives the limiting member to rotate, so that the contact surface releases the moving contact; when the mechanism seat is in the closed position, the locking member can be driven to rotate to release its contact with the mechanism seat, and the mechanism seat is driven to rotate to the open position, where the second actuating part drives the locking member to rotate to re-engage with the mechanism seat.

[0006] In an optional embodiment, the locking member includes a locking body and a locking fixing part, the locking fixing part is rotatably disposed on the mechanism seat, the locking body is disposed on the locking fixing part, and the second actuating part is linked with the locking fixing part.

[0007] In an optional embodiment, the mechanism seat has a snap fastener, and the latch body has a snap fastener portion, the snap fastener being adapted to the snap fastener portion.

[0008] In an optional embodiment, the second elastic element includes a torsion spring, wherein the first actuating portion and the second actuating portion are respectively two pins of the torsion spring.

[0009] In an optional embodiment, the second elastic element includes a U-shaped spring.

[0010] In an optional embodiment, the housing is provided with a mounting base and a limiting base, the U-shaped spring is disposed between the mounting base and the limiting base, and the limiting base has a recess that fits with the arcuate segment of the U-shaped spring, a first straight portion that fits with the first functional portion, and a second straight portion that fits with the second functional portion.

[0011] In an optional embodiment, the limiting member has a boss that abuts against the first actuating portion for holding the second elastic member between the limiting member and the housing.

[0012] In an optional embodiment, the limiting member has an abutting portion for abutting against the first actuating portion.

[0013] In an optional embodiment, the first actuating part is always in a deformable energy storage state, which is used to make the limiting member always have a tendency to rotate toward the mechanism seat.

[0014] Secondly, this utility model provides a circuit breaker, including a housing, a tripping member disposed within the housing, and a quick-closing mechanism as described in any of the foregoing embodiments.

[0015] The beneficial effects of the fast-closing mechanism and circuit breaker provided in this embodiment of the invention include: By configuring the second elastic element with both a first and a second acting part, the first acting part ensures that the limiting element always tends to rotate towards the moving contact, thereby guaranteeing the limiting element's restraining effect on the moving contact. Furthermore, when the locking element is driven to rotate away from the mechanism seat, and the mechanism seat rotates to the open state, the second acting part, in conjunction with the locking element, drives the locking element to rotate back to engage with the mechanism seat, facilitating the next closing operation of the circuit breaker and ensuring its protective effect. The second elastic element acts simultaneously on both the limiting element and the locking element, enabling both to be reset at the same time. This improves upon the current circuit breaker design, which uses numerous reset torsion springs, resulting in a large number of parts and a complex structure. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the circuit breaker from a first-view perspective provided in this embodiment; Figure 2 This is a schematic diagram of the circuit breaker from a second perspective provided in this embodiment; Figure 3 This is a schematic diagram of the rapid closing mechanism provided in this embodiment from a first-view perspective; Figure 4 This is a schematic diagram of the rapid closing mechanism provided in this embodiment from a second perspective. Figure 5 This is a partial cross-sectional view of the quick-closing mechanism provided in this embodiment at the open position; Figure 6 A partial cross-sectional view of the quick-closing mechanism provided in this embodiment in a first position.

[0018] Icons: 100-Housing; 110-Mounting base; 120-Limiting base; 200-Releasing element; 300-Quick closing mechanism; 310-Handle; 320-Mechanism base; 321-Moving contact; 322-Unlocking part; 323-Step buckle; 330-Locking element; 331-Locking body; 332-Locking fixing part; 333-Snap-on part; 340-Limiting element; 341-Abutting surface; 342-Unlocking surface; 343-Boss; 344-Abutting part; 350-Second elastic element; 351-First actuating part; 352-Second actuating part. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0021] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0022] In the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed during use, 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, and therefore should not be construed as a limitation of this utility model.

[0023] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0024] It should be noted that, where there is no conflict, the features in the embodiments of this utility model can be combined with each other.

[0025] The inventors of this application have discovered that existing circuit breakers contain multiple rotating mechanisms, such as quick-closing mechanisms, locking components, and limiting components. Each of these rotating mechanisms is equipped with a corresponding return torsion spring to drive the rotating mechanism to reset. This results in existing circuit breakers having multiple return spring structures inside, leading to numerous internal parts and a complex structure.

[0026] To address the problem of numerous internal parts and complex structure in current circuit breakers, this utility model provides a fast closing mechanism and circuit breaker. The following detailed description of the overall structure, working principle, and technical effects of the fast closing mechanism and circuit breaker provided by this utility model, through embodiments and in conjunction with the accompanying drawings, is a comprehensive overview.

[0027] On the one hand, please refer to Figure 1 and Figure 2 This utility model provides a circuit breaker applicable to power systems, industrial fields, building and commercial facilities, household electricity use, and other electricity consumption scenarios. It is used to control the on / off state of circuits and to provide overload protection, circuit breaking protection, leakage protection, and undervoltage / overvoltage protection. The circuit breaker provided by this utility model includes a housing 100, a tripping element 200 disposed within the housing 100, and a quick-closing mechanism 300 disposed within the housing 100. The tripping element 200 is used to trigger the quick-closing mechanism 300 to open the circuit breaker in the event of abnormal conditions such as short circuit, overload, leakage, or undervoltage / overvoltage during circuit breaking.

[0028] On the other hand, please refer to Figures 1-6 This utility model also provides a quick-closing mechanism 300, which is applied to the above-mentioned circuit breaker.

[0029] Please refer to Figures 1-3The quick-closing mechanism 300 provided by this utility model is disposed inside the housing 100, and includes a handle 310, a mechanism base 320, a locking element 330, and a limiting element 340. The quick-closing mechanism 300 also has an open position and a closed position. The handle 310, mechanism base 320, and limiting element 340 are all rotatably mounted inside the housing 100 via a rotating shaft. The mechanism base 320 is linked to the handle 310; that is, when the handle 310 is driven to rotate toward the closed position, the mechanism base 320 is driven to rotate toward the closed position; when the handle 310 is driven to rotate toward the open position, the mechanism base 320 is driven to rotate toward the open position. A moving contact 321 is rotatably disposed on the mechanism base 320. In this embodiment, the moving contact 321 and the mechanism base 320 are rotatably disposed on the same rotating shaft. In other embodiments, the rotating shaft of the moving contact 321 may be misaligned with the rotating shaft of the mechanism base 320. The housing 100 also includes a stationary contact, and a moving contact 321 is linked to the mechanism base 320 via a first elastic element. When the handle 310 and the mechanism base 320 are in the closed position, the moving contact 321 is pressed against the stationary contact by the first elastic element. Furthermore, the mechanism base 320 also has a reset element, which ensures that the mechanism base 320 always tends to rotate and reset towards the open position. A locking element 330 is rotatably mounted on the mechanism base 320 and engages with it. When the handle 310 drives the mechanism base 320 to rotate, the locking element 330 rotates synchronously. The limiting element 340 has an abutment surface 341 and an unlocking surface 342. The mechanism base 320 also has an unlocking part 322. The abutment surface 341 abuts against the moving contact 321, and the unlocking surface 342 abuts against the unlocking part 322. The quick-closing mechanism 300 provided by this utility model also includes a second elastic member 350. The second elastic member 350 has a first working part 351 and a second working part 352. The first working part 351 and the second working part 352 extend in the same direction, and the first working part 351 is linked with the limiting member 340, and the second working part 352 is linked with the locking member 330.

[0030] Combination Figure 5 and Figure 6The handle 310 drives the mechanism base 320 to rotate from the open position to the closed position. When the mechanism base 320 rotates to the first position, the moving contact 321 abuts against the abutting surface. The handle 310 continues to drive the mechanism base 320 to rotate towards the closed position. At this time, the moving contact 321 remains stationary under the action of the limiting member 340, and the first elastic member stores energy. The handle 310 continues to drive the mechanism base 320 to rotate towards the closed position until the unlocking part 322 abuts against the unlocking surface 342 and drives the limiting member 340 to rotate away from the mechanism base 320 until the limiting member 340 rotates to the point where the abutting surface 341 releases the abutment from the moving contact 321. At this time, the moving contact 321 rotates rapidly in the closing direction under the action of the first elastic member, realizing the rapid closing of the moving contact 321 and the stationary contact. When the quick-closing mechanism 300 is in the closed position, if a circuit fault occurs, the tripping element 200 in the circuit breaker drives the locking element 330 to rotate, causing the locking element 330 to disengage from the mechanism base 320. Consequently, the mechanism base 320, under the action of the reset element, rotates to the open position, causing the moving contact 321 to rotate until the stationary contact disengages, thus opening the circuit breaker. When the quick-closing mechanism 300 is in the open position, the second actuating part 352 drives the locking element 330 to rotate towards the mechanism base 320 until it re-engages with the mechanism base 320.

[0031] By configuring the second elastic element 350 with a first actuating part 351 and a second actuating part 352, the first actuating part 351 ensures that the limiting element 340 always tends to rotate towards the moving contact 321, thereby guaranteeing the limiting and supporting effect of the limiting element 340 on the moving contact 321. Furthermore, when the locking element 330 is driven to rotate away from the mechanism seat 320, and the mechanism seat 320 rotates to the open state, the second actuating part 352, in conjunction with the locking element 330, drives the locking element 330 to rotate and engage with the mechanism seat 320, ensuring the protection effect of the circuit breaker after the next closing. The second elastic element 350 acts simultaneously on both the limiting element 340 and the locking element 330, enabling both the limiting element 340 and the locking element 330 to be reset simultaneously. This improves upon the current circuit breaker design, which involves a large number of reset torsion springs, resulting in numerous circuit breaker parts and a complex structure.

[0032] Understandably, please refer to Figure 1 In this embodiment, a connecting rod is rotatably connected to the handle 310, and the other end of the connecting rod is rotatably connected to the mechanism base 320 to realize the linkage between the handle 310 and the mechanism base 320. When the handle 310 is driven to rotate by an external force, the handle 310 drives the mechanism base 320 to rotate accordingly through the connecting rod.

[0033] Understandably, please refer to Figure 1In this embodiment, the tripping component 200 is a thermomagnetic tripping device, an electronic tripping device, or a leakage current tripping device. In this embodiment, the locking component 330 is driven when an electric shock, circuit break, or other accident occurs in the circuit. The tripping mechanism of the tripping component 200 is activated instantaneously and pushes the locking component 330 to rotate relative to the mechanism seat 320, so that the locking component 330 rotates and disengages from the mechanism seat 320.

[0034] Please refer to Figure 1 and Figure 4 In some optional embodiments, the locking member 330 includes a locking body 331 and a locking fixing part 332. The locking fixing part 332 is rotatably disposed on the mechanism seat 320, and the locking body 331 is disposed on the locking fixing part 332. The mechanism seat 320 has a jump buckle 323, and the locking body 331 has a latching part 333. The jump buckle 323 and the latching part 333 are adapted to each other and can be interlocked. When the locking body 331 rotates to contact and interlock with the mechanism seat 320, and the mechanism seat 320 rotates to the open position under the action of the reset member, the second actuating part 352 abuts against the locking fixing part 332 and drives the locking member 330 to rotate, so that the latching part 333 re-interlocks with the jump buckle 323.

[0035] Please refer to Figure 5 and Figure 6 In some optional embodiments, the second elastic element 350 includes a torsion spring, which is fixedly disposed inside the housing 100. The two leads of the torsion spring extend in the same direction, and the first actuating part 351 and the second actuating part 352 are the two leads of the torsion spring, respectively. Thus, the two leads of the torsion spring act on the limiting member 340 and the locking member 330 respectively, and the torsion spring simultaneously realizes the reset of the limiting member 340 and the locking member 330.

[0036] Please refer to Figure 5 and Figure 6 In some alternative embodiments, the second elastic element 350 includes a U-shaped spring sheet, which includes an arc-shaped segment and a first actuating portion 351 and a second actuating portion 352 located at both ends of the arc-shaped segment. Further, in conjunction with... Figure 1 A mounting base 110 and a limiting base 120 are provided inside the housing 100. A U-shaped spring is disposed between the mounting base 110 and the limiting base 120. The mounting base 110 is a cylinder that conforms to the inner arc of the U-shaped spring. The limiting base 120 conforms to the outer side of the U-shaped spring and has a recess that conforms to the arc segment of the U-shaped spring, a first straight portion that conforms to the first actuating portion 351, and a second straight portion that conforms to the second actuating portion 352. The mounting base 110 and the limiting base 120 hold the U-shaped spring inside the housing 100. At the same time, the first straight portion and the second straight portion of the limiting base 120 conform to the first actuating portion 351 and the second actuating portion 352, respectively, thereby preventing relative rotation of the U-shaped spring when subjected to force and achieving the effect of limiting and fixing the U-shaped spring.

[0037] Please refer to Figure 3 Furthermore, the limiting member 340 has a boss 343, which abuts against the side of the first actuating part 351, thereby holding the first actuating part 351 between the limiting member 340 and the housing 100, preventing the U-shaped spring from moving along the length direction of the mounting base 110, and improving the installation stability of the U-shaped spring. In addition, the limiting member 340 also has an abutting part 344, which abuts against the first actuating part 351, and the abutting part 344 keeps the first actuating part 351 in a deformed, energy-storing state, thus ensuring that the limiting member 340 always tends to rotate towards the mechanism base 320.

[0038] In summary, the implementation principle of the quick-closing mechanism 300 and circuit breaker provided by this utility model is as follows: by setting the second elastic member 350 to have a first working part 351 and a second working part 352, the first working part 351 makes the limiting member 340 always have a tendency to rotate toward the moving contact 321, thereby ensuring the limiting member 340's limiting and supporting effect on the moving contact 321; and when the locking member 330 is driven to rotate to disengage from the mechanism seat 320, and the mechanism seat 320 rotates to the open state, the second working part 352 and the locking member 330 are linked to drive the locking member 330 to rotate to engage with the mechanism seat 320, which facilitates the next closing of the circuit breaker and ensures the protection effect of the circuit breaker. The second elastic element 350 acts simultaneously on the limiting element 340 and the locking element 330. The second elastic element 350 can simultaneously reset the limiting element 340 and the locking element 330, which improves the problem of the large number of reset torsion springs in the current circuit breaker, resulting in many circuit breaker parts and complex structure.

[0039] The above description is only a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model.

Claims

1. A quick-closing mechanism, disposed within a housing (100), characterized in that, The quick-closing mechanism (300) includes: A handle (310) is rotatably mounted on the housing (100). The mechanism base (320) is rotatably disposed on the housing (100) and linked with the handle (310). A movable contact (321) is rotatably disposed on the mechanism base (320). The movable contact (321) is linked with the mechanism base (320) through a first elastic element. A locking element (330) is rotatably disposed on the mechanism seat (320). The locking element (330) overlaps with the mechanism seat (320) to drive the locking element (330) to rotate synchronously when the mechanism seat (320) rotates. A limiting member (340) is rotatably disposed on the housing (100). The mechanism seat (320) has an unlocking part (322). The limiting member (340) has an abutting surface (341) for abutting against the moving contact (321) and an unlocking surface (342) for abutting against the unlocking part (322). The second elastic member (350) has a first working part (351) and a second working part (352) extending in the same direction. The first working part (351) is linked with the limiting member (340), and the second working part (352) is linked with the locking member (330). When the handle (310) drives the mechanism seat (320) to rotate toward the closed position to the first position, the moving contact (321) abuts against the contact surface (341); when the mechanism seat (320) continues to rotate toward the closed position, the unlocking part (322) abuts against the unlocking surface (342) and drives the limiting member (340) to rotate, so that the contact surface (341) and the moving contact (321) are released from contact; when the mechanism seat (320) is in the closed position, the locking member (330) can be driven to rotate to release the engagement with the mechanism seat (320), and the mechanism seat (320) is driven to rotate to the open position, and the second actuating part (352) is used to drive the locking member (330) to rotate to engage with the mechanism seat (320) again.

2. The quick-closing mechanism according to claim 1, characterized in that, The locking component (330) includes a locking body (331) and a locking fixing part (332). The locking fixing part (332) is rotatably disposed on the mechanism seat (320). The locking body (331) is disposed on the locking fixing part (332). The second actuating part (352) is linked with the locking fixing part (332).

3. The quick-closing mechanism according to claim 2, characterized in that, The mechanism base (320) has a snap fastener (323), and the latch body (331) has a latch portion (333), the snap fastener (323) being adapted to the latch portion (333).

4. The quick-closing mechanism according to claim 1, characterized in that, The second elastic element (350) includes a torsion spring, wherein the first actuating part (351) and the second actuating part (352) are respectively the two pins of the torsion spring.

5. The quick-closing mechanism according to claim 1, characterized in that, The second elastic element (350) includes a U-shaped spring sheet.

6. The quick-closing mechanism according to claim 5, characterized in that, The housing (100) is provided with a mounting base (110) and a limiting base (120). The U-shaped spring is disposed between the mounting base (110) and the limiting base (120). The limiting base (120) has a recess that fits with the arc segment of the U-shaped spring, a first straight portion that fits with the first functional portion (351), and a second straight portion that fits with the second functional portion (352).

7. The quick-closing mechanism according to any one of claims 1-6, characterized in that, The limiting member (340) has a boss (343) that abuts against the first actuating part (351) for holding the second elastic member (350) between the limiting member (340) and the housing (100).

8. The quick-closing mechanism according to any one of claims 1-6, characterized in that, The limiting member (340) has an abutting portion (344) for abutting against the first actuating portion (351).

9. The quick-closing mechanism according to any one of claims 1-6, characterized in that, The first actuating part (351) is always in a deformable energy storage state, which is used to make the limiting member (340) always have a tendency to rotate toward the mechanism seat (320).

10. A circuit breaker, characterized in that, It includes a housing (100), a release element (200) disposed within the housing (100), and a quick-closing mechanism (300) as described in any one of claims 1-9.

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