Electric tripping and opening mechanism of circuit breaker

Abstract

The invention discloses an electric tripping and opening mechanism of a circuit breaker. The electric tripping and opening mechanism comprises a lock catch, an armature, a gear, a fixed shaft and a reset torsion spring of a tripping mechanism of the circuit breaker, the gear is rotatably mounted in the circuit breaker shell, and a third bump is fixed on the outer side of the gear; the fixed shaft is fixed in the circuit breaker shell; the lower end of the armature rotatably sleeves the fixed shaft, and the upper end of the armature extends between the lock catch and the gear and corresponds to the lock catch in position; the reset torsion spring is sleeved on the fixed shaft; two ends of the reset torsion spring are respectively clamped on the armature and the circuit breaker shell; and the third bump can rotate along with the gear to push the armature, so that the armature strikes the lock catch, and the tripping mechanism of the circuit breaker is tripped and opened. The gear directly acts on the armature of the instantaneous tripping mechanism of the circuit breaker, so that the tripping mechanism of the circuit breaker is unlocked and tripped, the breaking function of the mechanism is realized without adding parts, the mechanism is simple, the number of the parts is small, and the function is reliable.

Description

Technical Field

[0001] The invention belongs to the technical field of low-voltage electrical equipment, and in particular relates to an electric tripping and opening mechanism of a circuit breaker. Background Art

[0002] Because the low-voltage electrical appliances are now developing in the direction of intelligence, such as smart home and 5G communication, and the construction of 5G network is just in the ascendant. However, the reliability of intelligent miniature circuit breakers in the current power distribution industry in terms of intelligent control needs to be improved. Summary of the invention

[0003] In order to solve the above problems, the purpose of the present invention is to provide an "electric tripping and disconnecting mechanism" specially designed under this background to realize and improve the electric tripping function and reliability of the intelligent miniature circuit breaker.

[0004] The purpose of the present invention is achieved through the following technical solutions: An electric tripping and opening mechanism of a circuit breaker comprises a lock, an armature, a gear, a fixed shaft and a reset torsion spring of the circuit breaker tripping mechanism; the gear is rotatably mounted in a circuit breaker housing, and a third protrusion is fixed on the outer side of the gear; the fixed shaft is fixed in the circuit breaker housing; the lower end of the armature is rotatably sleeved on the fixed shaft, and the upper end extends between the lock and the gear and corresponds to the position of the lock; the reset torsion spring is sleeved on the fixed shaft, and the two ends of the reset torsion spring are respectively clamped on the armature and the circuit breaker housing; the third protrusion can push the armature as the gear rotates, so that the armature hits the lock, and the circuit breaker tripping mechanism is tripped and opened.

[0005] Furthermore, a first protrusion is provided on the lock catch, and a second protrusion cooperating with the first protrusion is provided on the upper end of the armature. When the armature swings toward the lock catch, the second protrusion hits the first protrusion, causing the circuit breaker tripping mechanism to trip and open the circuit breaker.

[0006] Furthermore, the armature is an armature in the instantaneous tripping mechanism of the circuit breaker, and shares a piece of armature with the instantaneous tripping mechanism of the circuit breaker, thereby saving parts and costs, and saving the internal space of the circuit breaker.

[0007] Furthermore, the gears include but are not limited to any one or more of cylindrical gears, bevel gears, non-circular gears, racks, worm gears, spur gears, helical gears, herringbone gears, curved gears, external gears and internal gears.

[0008] Furthermore, gear teeth are arranged in an area of ​​more than two-thirds of the outer circumference of the gear, and the third protrusion is arranged in an area of ​​the outer circumference of the gear where no gear teeth are arranged.

[0009] Furthermore, the end surface of the third protrusion used to push the armature is an arc surface.

[0010] The present invention directly acts on the armature of the circuit breaker instantaneous tripping mechanism through the gear to unlock and trip the circuit breaker tripping mechanism, and does not need to add parts to realize the mechanism breaking function. The mechanism is simple, the number of parts is small, and the function is reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The structure of the present invention is further described in detail below in conjunction with the accompanying drawings.

[0012] Figure 1 It is a schematic diagram of the electric tripping opening mechanism of the present invention in the disconnected state.

[0013] Figure 2 It is a schematic diagram of the electric tripping opening mechanism of the present invention in the connected state.

[0014] Figure 3 It is a schematic diagram of the electric tripping opening mechanism of the present invention in the connected state.

[0015] Figure 4 It is a schematic structural diagram of the lock buckle of the present invention.

[0016] Figure 5 It is a schematic diagram of the structure of the gear described in the present invention.

[0017] Figure 6 It is a schematic diagram of the structure of the armature of the present invention.

[0018] As shown in the figure: 1-lock, 11-first protrusion, 2-armature, 21-second protrusion, 22-pressure surface, 3-gear, 31-third protrusion, 5-fixed shaft, 5-reset torsion spring. DETAILED DESCRIPTION

[0019] The following is an explanation of the implementation of the present invention by specific specific embodiments. People familiar with the technology can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] It should be noted that the structures, proportions, sizes, etc. drawn in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change of the proportional relationship or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the effects and purposes that can be achieved by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and so on quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. The change or adjustment of their relative relationship should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

[0021] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. It should be noted that the terms "include", "comprise" or any other variants are intended to cover non-exclusive inclusion, so that a process, method, article or device that includes a series of elements includes not only those elements, but also includes other elements that are not explicitly listed, or also includes elements inherent to such process, method, article or device. Example

[0022] like Figure 1-6 The embodiment shown provides an electric tripping and opening mechanism of a circuit breaker, comprising a lock 1, an armature 2, a gear 3, a fixed shaft 4 and a reset torsion spring 5.

[0023] The lock catch 1 is a component of the circuit breaker tripping mechanism in a conventional circuit breaker. In the conventional circuit breaker tripping mechanism, the lock catch 1 and the tripping catch are buckled together. When the lock catch 1 is rotated to release the lock catch and the tripping catch, the circuit breaker tripping mechanism is tripped and opened (the moving contact and the static contact are separated). A first protrusion 11 is provided on the side of the lock catch 1 facing the gear.

[0024] The gear 3 is rotatably installed in the circuit breaker housing, and the gear 3 includes but is not limited to any one or more of a cylindrical gear, a bevel gear, a non-circular gear, a rack, a worm gear, a spur gear, a helical gear, a herringbone gear, a curved gear, an external gear and an internal gear. An area more than two-thirds of the outer periphery of the gear 3 is provided with gear teeth, and a third protrusion 31 is fixed on the outer side of the gear 3. The third protrusion 31 is arranged on an area on the outer periphery of the gear 3 where no gear teeth are arranged. The third protrusion 31 can push the armature 2 as the gear 3 rotates, so that the armature 2 hits the lock buckle 1, so that the circuit breaker tripping mechanism is tripped and opened; the end face of the third protrusion 31 is an arc surface (for pushing the armature 2).

[0025] The fixed shaft 4 is vertically fixed in the circuit breaker housing and is located below the gear 3 .

[0026] The lower end of the armature 2 is rotatably sleeved on the fixed shaft 4 and can rotate around the fixed shaft 4. The upper end of the armature 2 extends between the lock buckle 1 and the gear 3 and corresponds to the position of the lock buckle 1. A second protrusion 21 that cooperates with the first protrusion 11 is provided at the upper end of the armature 2. The surface of the armature 2 facing the third protrusion 31 is a pressure surface 22. When the armature 2 is pushed by the third protrusion 31 and swings toward the lock buckle 1, the second protrusion 21 will hit the first protrusion 11, driving the lock buckle 1 to rotate, and the lock buckle 1 is tripped from the tripping buckle 1 of the circuit breaker tripping machine, so that the circuit breaker tripping mechanism can be tripped and opened. The armature 2 is the armature in the instantaneous tripping mechanism of the circuit breaker. This embodiment adopts a method of sharing an armature with the instantaneous tripping mechanism of the circuit breaker, saving parts and costs, and saving the internal space of the circuit breaker.

[0027] The reset torsion spring 5 is sleeved on the fixed shaft 4, one torsion arm of the reset torsion spring 5 is clamped on the armature 2, and the other torsion arm of the reset torsion spring 5 is clamped on the circuit breaker housing, so as to reset the armature 2 after the armature 2 hits the lock buckle 1.

[0028] In order to drive the gear 3 to rotate, a reduction motor is provided in the circuit breaker housing. The reduction motor and the gear 3 can be directly linked, or common transmission components can be provided between the reduction motor and the gear 3 to transmit the power of the reduction motor to the gear 3. Common transmission components include but are not limited to gears, gear sets or transmission belts. For example, if the gear 3 is a turbine, then a worm gear coaxially connected to the reduction motor to realize transmission is realized; the type of the gear 3 and the type of the transmission component can be arbitrarily matched according to actual needs. Working principle:

[0029] Electric tripping (breaking): like Figure 2As shown, when the circuit breaker is in the on state (the third protrusion 31 of the gear 3 is located at the upper right of the armature 2, and the second protrusion 21 of the armature 2 is not in contact with the first protrusion 11 of the lock catch 1), the motor and the worm are used to control the gear 3 to move counterclockwise (the gear 3 uses a turbine), and the third protrusion 31 of the gear 3 hits the pressure surface 22 of the armature 2 to make the armature 2 move counterclockwise around the fixed shaft 4. At this time, the second protrusion 21 at the end of the armature 2 will hit the first protrusion 11 on the lock catch 1, thereby pushing the lock catch 1 to rotate and trip the tripping buckle, so that the circuit breaker tripping mechanism is unlocked and tripped, completing the breaking action (such as Figure 3 Then the motor and worm control gear 3 to move clockwise, returning to Figure 1 The position shown (the circuit breaker is open, the third protrusion 31 of the gear 3 is disengaged from the armature 2, and the armature 2 is reset under the action of the reset torsion spring 5, and the second protrusion 21 of the armature 2 is disengaged from the first protrusion 11 of the lock 1).

[0030] Other aspects of the present invention that are not described in detail are all conventional techniques known to those skilled in the art.

[0031] It should be noted that the terms "comprises", "includes" or any other variations are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0032] The protection scope of the present invention is not limited to the technical solutions disclosed in the specific implementation methods. Any modifications, equivalent replacements, improvements, etc. made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. An electric tripping mechanism for a circuit breaker, comprising a lock (1) of the circuit breaker tripping mechanism, characterized in that: The invention also comprises an armature (2), a gear (3), a fixed shaft (4) and a reset torsion spring (5); the gear (3) is rotatably mounted in the circuit breaker housing, and a third protrusion (31) is fixed on the outer side of the gear (3); the fixed shaft (4) is fixed in the circuit breaker housing; the lower end of the armature (2) is rotatably sleeved on the fixed shaft (4), and the upper end extends between the lock catch (1) and the gear (3) and corresponds to the position of the lock catch (1); the reset torsion spring (5) is sleeved on the fixed shaft (4), and the two ends of the reset torsion spring (5) are respectively clamped on the armature (2) and the circuit breaker housing; the third protrusion (31) can push the armature (2) with the rotation of the gear (3), so that the armature (2) hits the lock catch (1), and the circuit breaker tripping mechanism is tripped and opened.

2. The electric tripping and opening mechanism of the circuit breaker according to claim 1, characterized in that: A first protrusion (11) is provided on the lock catch (1), and a second protrusion (21) cooperating with the first protrusion (11) is provided on the upper end of the armature (2); when the armature (2) swings toward the lock catch (1), the second protrusion (21) hits the first protrusion (11), causing the circuit breaker tripping mechanism to trip and open.

3. The electric tripping and opening mechanism of the circuit breaker according to claim 1, characterized in that: The armature (2) is an armature in an instantaneous tripping mechanism of a circuit breaker.

4. The electric tripping and opening mechanism of the circuit breaker according to claim 1, characterized in that: The gear (3) includes but is not limited to any one or more of a cylindrical gear, a bevel gear, a non-circular gear, a rack, a worm gear, a spur gear, a helical gear, a herringbone gear, a curved gear, an external gear and an internal gear.

5. The electric tripping and opening mechanism of the circuit breaker according to claim 1, characterized in that: An area of ​​more than two-thirds of the outer circumference of the gear (3) is provided with gear teeth, and the third protrusion (31) is arranged on an area of ​​the outer circumference of the gear (3) where no gear teeth are provided.

6. The electric tripping and opening mechanism of the circuit breaker according to claim 1, characterized in that: The end surface of the third protrusion (31) used for pushing the armature (2) is an arc surface.

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