A tripping force amplification and reset mechanism and a circuit breaker

Abstract

A tripping force amplification and reset mechanism and a circuit breaker. The tripping force amplification and reset mechanism of the circuit breaker includes a movement tripping latch, a pressure plate, an elastic energy storage member, a reset pressure plate, a movement locking latch, and a movement locking latch spring. Its advantages are as follows: 1. During tripping, the tripping force can be amplified through the tripping force amplification and reset mechanism, so as to meet the requirements of the operating mechanism for the tripping force and ensure the stable and reliable tripping action; 2. During reset, through the tripping force amplification and reset mechanism, not only the reset of the tripping device is realized, but also the phenomena of slipping and non-latching can be avoided, ensuring the stable and reliable reset action.

Description

Technical Field

[0001] The present invention relates to the field of electrical switches, and particularly to a force amplification and reset mechanism for a release and a circuit breaker. Background Art

[0002] At present, when a circuit breaker trips, it is usually directly that a release ejector rod ejects and impacts a latch in the operating mechanism, causing it to act and separate from the trip latch to unlock and achieve the tripping action.

[0003] Since the tripping force of the circuit breaker during breaking is not uniform and stable, generally between 0.5 - 2N, while the impact force that a small magnetic release electromagnetic release can generate is limited under the volume limitation, usually between 0.4 - 1N, so it cannot meet the tripping requirements of most small circuit breakers.

[0004] In addition, after the magnetic release electromagnetic release releases the moving armature to act as a switch action after being interfered by a weak current, it cannot automatically reset and cannot perform a second operation. Summary of the Invention

[0005] In order to overcome the deficiencies of the background art, the present invention provides a force amplification and reset mechanism for a release and a circuit breaker.

[0006] The technical solution adopted by the present invention: A force amplification and reset mechanism for a release, which is arranged in a housing and is located between the release and the operating mechanism; including

[0007] A movement trip latch, its upper end forms a first hinge portion and is rotationally matched with the housing, its lower end forms a first locking portion, and a tripping impact portion corresponding to the latch of the operating mechanism is provided on the movement trip latch;

[0008] A pressure plate, its lower end forms a second hinge portion and is rotationally matched with the housing, its upper end is linked and matched with a handle;

[0009] An elastic energy storage member, which connects the movement trip latch and the pressure plate;

[0010] A reset pressure plate, its lower end forms a third hinge portion and is rotationally matched with the housing, its upper end forms a reset pressing portion, the reset pressing portion is arranged between the release and the pressure plate and corresponds to the ejector rod of the release;

[0011] A movement lock latch, its lower end forms a fourth hinge portion and is rotationally matched with the housing, its upper end forms a second locking portion corresponding to and cooperating with the first locking portion, the movement lock latch and the reset pressure plate are arranged in parallel and rotate coaxially, and a rotation limiting structure is provided between the movement lock latch and the reset pressure plate;

[0012] A movement lock latch spring, which abuts against the movement lock latch and can drive the movement lock latch to rotate and reset to engage with the movement trip latch.

[0013] The trip impact part is an arc-shaped convex platform corresponding to the latch of the operating mechanism.

[0014] A limiting hole is provided at a position near the middle of the movement toggle, a limiting groove is provided at a position near the middle of the pressure plate, the elastic energy storage member is a torsion spring, and its two torsion feet are respectively arranged in the limiting hole and the limiting groove.

[0015] A cylindrical convex platform coaxial with the first hinge part is provided at the upper end of the movement toggle, and the spring coil of the elastic energy storage member is sleeved on the cylindrical convex platform.

[0016] A long slot is provided at the upper end of the pressure plate, and the pressure plate and the handle are linked by a U-shaped connecting rod. One end of the U-shaped connecting rod is inserted into the long slot, and the other end is connected to the handle.

[0017] A rotating groove and an arc-shaped limiting groove centered on the rotation center of the third hinge part are provided on the reset pressure plate;

[0018] A rotating convex platform and a limiting convex platform centered on the rotation center of the fourth hinge part are provided on the movement latch;

[0019] The reset pressure plate and the movement latch are rotationally matched through the rotating groove and the rotating convex platform, and the limiting convex platform is correspondingly arranged in the arc-shaped limiting groove.

[0020] A circuit breaker includes a housing, and a trip unit, an operating mechanism, a handle, a contact mechanism, and the above-mentioned trip force amplification and reset mechanism arranged in the housing.

[0021] The beneficial effects of the present invention are as follows: 1. During tripping, the trip force can be amplified through the trip force amplification and reset mechanism, so as to meet the requirement of the operating mechanism for the trip force and ensure the stable and reliable tripping action; 2. During resetting, through the trip force amplification and reset mechanism, not only the reset of the trip unit can be realized, but also the phenomena of slipping latch and non-latching can be avoided, ensuring the stable and reliable reset action. Description of the Drawings

[0022] Figure 1 It is a schematic structural diagram of the leakage circuit breaker in the tripping state according to the embodiment of the present invention.

[0023] Figure 2 It is a schematic structural diagram of the leakage circuit breaker in the closing state according to the embodiment of the present invention.

[0024] Figure 3 It is a schematic structural diagram of the amplification and reset mechanism according to the embodiment of the present invention.

[0025] Figure 4 It is an exploded structural diagram of the amplification and reset mechanism according to the embodiment of the present invention.

[0026] Figure 5 This is a schematic structural diagram of the movement toggle of the embodiment of the present invention.

[0027] Figure 6 This is a schematic structural diagram of the pressure plate of the embodiment of the present invention.

[0028] Figure 7 This is a schematic structural diagram of the reset pressure plate and the movement lock of the embodiment of the present invention.

[0029] Figure 8 This is a schematic structural diagram of the reset pressure plate of the embodiment of the present invention.

[0030] Figure 9 This is a schematic structural diagram of the movement lock of the embodiment of the present invention. Detailed implementation manners

[0031] The following further describes the embodiments of the present invention with reference to the accompanying drawings:

[0032] As Figure 3-4 shown, a tripping force amplification and reset mechanism is provided in the housing 10 and is located between the tripping device 20 and the operating mechanism 30. The amplification and reset mechanism 60 includes a movement toggle 1, a pressure plate 2, an elastic energy storage member 3, a reset pressure plate 4, a movement lock 5, and a movement lock spring 6.

[0033] As Figure 1 and Figure 5 shown, a first hinge portion 11 is formed at the upper end of the movement toggle 1. The first hinge portion 11 is a hinge hole. The movement toggle 1 is installed on the first mounting post 101 in the housing 10 through the first hinge portion 11 and forms a rotational fit with the housing 10. A first locking portion 12 is formed at the lower end of the movement toggle 1, which can be latched with the movement lock during closing. The movement toggle 1 is arranged on one side of the lock of the operating mechanism 30, and an arc-shaped convex platform is provided on the side wall of the movement toggle 1 corresponding to the operating mechanism 30 as a tripping impact portion 13. A limiting hole 14 is also provided at a position near the middle of the movement toggle 1. A cylindrical convex platform 15 coaxial with the first hinge portion 11 is further formed at the upper end of the movement toggle 1.

[0034] As Figure 1 and Figure 6 shown, a second hinge portion 21 is formed at the lower end of the pressure plate 2. The second hinge portion 21 is a hinge hole. The pressure plate 2 is installed on the second mounting post 102 in the housing 10 through the second hinge portion 21 and forms a rotational fit with the housing 10. A limiting groove 22 is provided at a position near the middle of the pressure plate 2. A long groove 23 is provided at the upper end of the pressure plate 2. The pressure plate 2 and the handle 40 are linked by a U-shaped connecting rod 7. One end of the U-shaped connecting rod 7 is inserted into the long groove 23, and the other end is connected to the handle 40.

[0035] As Figure 1 and Figure 3-6 shown, the elastic energy storage member 3 is used to connect the movement toggle 1 and the pressure plate 2. The elastic energy storage member 3 is a torsion spring, the spring coil of which is sleeved on the cylindrical boss 15, and the two torsion feet are respectively arranged in the limit hole 14 and the limit groove 22.

[0036] As Figure 1 and Figure 7-9 shown, a third hinge portion 41 is formed at the lower end of the reset pressure plate 4. The third hinge portion 41 is also a hinge hole and is installed on the second mounting post 102 in the housing 10 to form a rotational fit with the housing 10. A reset pressing portion 42 is formed at the upper end of the reset pressure plate 4. The reset pressing portion 42 is arranged between the release 20 and the pressure plate 2 and corresponds to the ejector rod of the release 20.

[0037] A fourth hinge portion 51 is formed at the lower end of the movement lock 5. The fourth hinge portion 51 is also a hinge hole and is installed on the second mounting post 102 in the housing 10 to form a rotational fit with the housing 10. A second locking portion 52 is formed at the upper end of the movement lock 5, which can be latched with the first locking portion 12 of the movement toggle 1 during closing.

[0038] Wherein, a rotating groove 43 and an arc-shaped limit groove 44 centered on the rotation center of the third hinge portion 41 are provided on the reset pressure plate 4; a rotating boss 53 and a limit boss 54 centered on the rotation center of the fourth hinge portion 51 are provided on the movement lock 5;

[0039] The reset pressure plate 4 and the movement lock 5 are arranged in parallel and achieve relative rotational fit through the rotating groove 43 and the rotating boss 53. At the same time, the limit boss 54 is correspondingly arranged in the arc-shaped limit groove 44 to realize rotational limit between the reset pressure plate 4 and the movement lock 5, so that the reset pressure plate 4 and the movement lock 5 can only perform relative rotational movement within a certain angle range.

[0040] The movement lock spring 6 is a torsion spring, which is installed on the second mounting post 102 in the housing 10, and one end of which abuts against the movement lock 5 and can drive the movement lock 5 to rotate and reset to be latched with the movement toggle 1.

[0041] The separate setting and rotational limit structure of the reset pressure plate 4 and the movement lock 5 not only ensure stable operation during tripping, but also enable the movement toggle 1 to be smoothly reset through the relative rotational movement between the reset pressure plate 4 and the movement lock 5 during reset after tripping, avoiding the problem of mutual jamming between the movement toggle 1 and the movement lock 5.

[0042] As Figure 1As shown, when the residual current circuit breaker is in the off state, at this time, under the action of the handle return force, the pressure plate presses the reset pressure plate, and the reset pressure plate presses on the ejector rod of the release, so as to ensure that the ejector rod of the release is tightly pressed.

[0043] As Figure 2 shown, when the residual current circuit breaker is in the on state, at this time, the movement trip and the movement lock catch are locked with each other, and under the action of the handle, the pressure plate generates a relative displacement with the movement trip, so as to compress the elastic energy storage component for energy storage.

[0044] During the closing operation, the operating mechanism is driven by the handle to act, and the contact mechanism is driven by the operating mechanism to realize closing conduction. During this process, the handle can drive the pressure plate to rotate at the same time. The pressure plate drives the movement trip to rotate through the elastic energy storage component. When the movement trip is locked and cannot move by the movement lock catch, the pressure plate still rotates, so as to compress the elastic energy storage component for energy storage until the closing is completed.

[0045] When the release is disconnected, the ejector rod of the release first ejects and impacts the reset pressure plate, and the reset pressure plate drives the movement lock catch to act, so that the movement lock catch and the movement trip are separated to realize unlocking, so that the movement trip can quickly rotate under the elastic action of the elastic energy storage component and impact the lock catch of the operating structure, so that the operating mechanism trips and drives the contact mechanism to act to realize opening and disconnecting.

[0046] During the opening and tripping operation, the handle quickly returns under the action of the handle torsion spring and the operating mechanism. During this process, the handle can drive the pressure plate to rotate and reset. The pressure plate drives the movement trip to rotate and reset through the elastic energy storage component. At the same time, the pressure plate pushes the reset pressure plate to rotate and reset, and the reset pressure plate presses the ejector rod of the release back. The movement lock catch is automatically reset under the drive of the movement lock catch spring.

[0047] And adopting the above scheme, during closing, the elastic energy storage component is used for elastic energy storage. When tripping, the ejector rod of the release is used to amplify the unlocking force of the release and the reset mechanism and release the elastic energy storage of the elastic energy storage component. It can release an elastic force far greater than the impact force of the release, so as to meet the requirements of the operating mechanism for the tripping force and ensure the stable and reliable tripping action.

[0048] During opening, the return force of the handle acts on the upper end of the pressure plate. The lower end of the pressure plate is hinged on the housing, which is equivalent to a lever structure. Through the release force amplification and reset mechanism, not only the reset of the release is realized, but also the phenomena of slipping and non-latching can be avoided, ensuring the stable and reliable reset action.

[0049] The above-mentioned release force amplification and reset mechanism is mainly used for directly converting the circuit breaker into a residual current release + the N pole of the circuit breaker, and can also be directly used as a backup protector in the lightning protection system, etc.

[0050] AsFigure 1-2 As shown, a leakage circuit breaker includes a housing 10, a release 20, an operating mechanism 30, a handle 40, and a contact mechanism 50 disposed within the housing 10. An amplification and reset mechanism 60 for the release force is provided between the release 20 and the operating mechanism 30.

[0051] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0052] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "mounted", "connected", and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In addition, in the description of the present invention, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0053] All technicians should note that although the present invention has been described according to the above specific embodiments, the inventive concept of the present invention is not limited to this invention only. Any modification using the inventive concept of the present invention will be included in the scope of protection of the patent right of this patent.

Claims

1. A tripping force amplification and reset mechanism is provided inside a housing (10) and is located between a tripping device (20) and an operating mechanism (30); characterized in that: Comprising: A movement toggle (1), the upper end of which forms a first hinge portion (11) and is rotationally engaged with the housing (10), and the lower end of which forms a first locking portion (12). A tripping impact portion (13) corresponding to the locking of the operating mechanism (30) is provided on the movement toggle (1); A pressure plate (2), the lower end of which forms a second hinge portion (21) and is rotationally engaged with the housing (10), and the upper end of which is linked and cooperated with the handle (40) through a U-shaped connecting rod (7); An elastic energy storage member (3), which is a torsion spring, and the two torsion feet of which are respectively connected to the movement toggle (1) and the pressure plate (2); A reset pressure plate (4), the lower end of which forms a third hinge portion (41) and is rotationally engaged with the housing (10), and the upper end of which forms a reset pressing portion (42). The reset pressing portion (42) is arranged between the release (20) and the pressure plate (2) and corresponds to the ejector rod of the release (20); A movement lock (5), the lower end of which forms a fourth hinge portion (51) and is rotationally engaged with the housing (10), and the upper end of which forms a second locking portion (52) corresponding to and cooperating with the first locking portion (12). The movement lock (5) and the reset pressure plate (4) are arranged side by side and rotate coaxially, and a rotation limiting structure is provided between the movement lock (5) and the reset pressure plate (4); A movement lock spring (6), which abuts against the movement lock (5) and can drive the movement lock (5) to rotate and reset to engage with the movement toggle (1).

2. The force amplification and reset mechanism of a release according to claim 1, characterized in that: The tripping impact portion (13) is an arc-shaped boss corresponding to the locking of the operating mechanism (30).

3. The force amplification and reset mechanism of a release as claimed in claim 1, characterized in that: A limiting hole (14) is provided at a position near the middle of the movement toggle (1), a limiting groove (22) is provided at a position near the middle of the pressure plate (2), and the two torsion feet of the elastic energy storage member (3) are respectively arranged in the limiting hole (14) and the limiting groove (22).

4. The trip force amplification and reset mechanism according to claim 3, characterized in that: A cylindrical boss (15) coaxial with the first hinge portion (11) is provided at the upper end of the movement toggle (1), and the spring coil of the elastic energy storage member (3) is sleeved on the cylindrical boss (15).

5. An amplifying and resetting mechanism for the tripping force according to claim 1, characterized in that: A long slot (23) is provided at the upper end of the pressure plate (2), one end of the U-shaped connecting rod (7) is inserted into the long slot (23), and the other end is connected to the handle (40).

6. The force amplification and reset mechanism of a release according to claim 1, characterized in that: A rotation groove (43) and an arc-shaped limiting groove (44) centered on the rotation center of the third hinge portion (41) are provided on the reset pressure plate (4); A rotation boss (53) and a limiting boss (54) centered on the rotation center of the fourth hinge portion (51) are provided on the movement lock (5); The reset pressure plate (4) and the movement lock (5) are rotationally engaged through the rotation groove (43) and the rotation boss (53), and the limiting boss (54) is correspondingly arranged in the arc-shaped limiting groove (44).

7. A circuit breaker, characterized in that: Comprising a housing (10) and a release (20), an operating mechanism (30), a handle (40), a contact mechanism (50) and a release force amplification and reset mechanism (60) according to any one of claims 1-6 provided in the housing (10).

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